diff --git a/plugins/Geography/README.md b/plugins/Geography/README.md
new file mode 100644
index 000000000..15d14074e
--- /dev/null
+++ b/plugins/Geography/README.md
@@ -0,0 +1 @@
+Provides geography facts, such as timezones.
diff --git a/plugins/Geography/__init__.py b/plugins/Geography/__init__.py
new file mode 100644
index 000000000..559ff38d9
--- /dev/null
+++ b/plugins/Geography/__init__.py
@@ -0,0 +1,72 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+"""
+Geography: Provides geography facts, such as timezones.
+"""
+
+import sys
+import supybot
+from supybot import world
+
+# Use this for the version of this plugin.
+__version__ = ""
+
+# XXX Replace this with an appropriate author or supybot.Author instance.
+__author__ = supybot.authors.unknown
+
+# This is a dictionary mapping supybot.Author instances to lists of
+# contributions.
+__contributors__ = {}
+
+# This is a url where the most recent plugin package can be downloaded.
+__url__ = ""
+
+from . import config
+from . import plugin
+
+if sys.version_info >= (3, 4):
+    from importlib import reload
+else:
+    from imp import reload
+# In case we're being reloaded.
+reload(config)
+reload(plugin)
+# Add more reloads here if you add third-party modules and want them to be
+# reloaded when this plugin is reloaded.  Don't forget to import them as well!
+
+if world.testing:
+    from . import test
+
+Class = plugin.Class
+configure = config.configure
+
+
+# vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:
diff --git a/plugins/Geography/common.py b/plugins/Geography/common.py
new file mode 100644
index 000000000..97f413013
--- /dev/null
+++ b/plugins/Geography/common.py
@@ -0,0 +1,43 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+import supybot.utils as utils
+
+
+def headers():
+    headers = utils.web.defaultHeaders.copy()
+
+    # Comply with https://meta.wikimedia.org/wiki/User-Agent_policy
+    # and https://operations.osmfoundation.org/policies/nominatim/
+    headers[
+        "User-agent"
+    ] += " https://github.com/progval/Limnoria/ - Geography plugin"
+
+    return headers
diff --git a/plugins/Geography/config.py b/plugins/Geography/config.py
new file mode 100644
index 000000000..396b7f9c0
--- /dev/null
+++ b/plugins/Geography/config.py
@@ -0,0 +1,53 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+from supybot import conf, registry
+from supybot.i18n import PluginInternationalization
+
+_ = PluginInternationalization("Geography")
+
+
+def configure(advanced):
+    # This will be called by supybot to configure this module.  advanced is
+    # a bool that specifies whether the user identified themself as an advanced
+    # user or not.  You should effect your configuration by manipulating the
+    # registry as appropriate.
+    from supybot.questions import expect, anything, something, yn
+
+    conf.registerPlugin("Geography", True)
+
+
+Geography = conf.registerPlugin("Geography")
+# This is where your configuration variables (if any) should go.  For example:
+# conf.registerGlobalValue(Geography, 'someConfigVariableName',
+#     registry.Boolean(False, _("""Help for someConfigVariableName.""")))
+
+
+# vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:
diff --git a/plugins/Geography/local/__init__.py b/plugins/Geography/local/__init__.py
new file mode 100644
index 000000000..e86e97b86
--- /dev/null
+++ b/plugins/Geography/local/__init__.py
@@ -0,0 +1 @@
+# Stub so local is a module, used for third-party modules
diff --git a/plugins/Geography/nominatim.py b/plugins/Geography/nominatim.py
new file mode 100644
index 000000000..d244e5199
--- /dev/null
+++ b/plugins/Geography/nominatim.py
@@ -0,0 +1,78 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+
+import json
+import time
+import threading
+import urllib.parse
+
+import supybot.utils as utils
+from .common import headers
+
+NOMINATIM_BASE_URL = "https://nominatim.openstreetmap.org"
+
+_QUERY_LOCK = threading.Lock()
+_LAST_QUERY_TIME = 0
+
+
+def _wait_before_query():
+    """Should be called before any API access. Blocks the current thread
+    in order to follow the rate limit:
+    https://operations.osmfoundation.org/policies/nominatim/"""
+
+    global _LAST_QUERY_TIME
+
+    min_time_between_queries = 1.0
+
+    with _QUERY_LOCK:
+        time_since_last_query = _LAST_QUERY_TIME - time.time()
+        if time_since_last_query >= min_time_between_queries:
+            time.sleep(min_time_between_queries - time_since_last_query)
+        _LAST_QUERY_TIME = time.time()
+
+
+def _query_nominatim(path, params):
+    url = NOMINATIM_BASE_URL + path + "?" + urllib.parse.urlencode(params)
+
+    _wait_before_query()
+
+    content = utils.web.getUrlContent(url, headers=headers())
+    return json.loads(content)
+
+
+def search_osmids(query):
+    """Queries nominatim's search endpoint and returns a list of OSM ids
+
+    See https://nominatim.org/release-docs/develop/api/Search/ for details
+    on the query format"""
+    data = _query_nominatim("/search", {"format": "json", "q": query})
+
+    return [item["osm_id"] for item in data if item.get("osm_id")]
diff --git a/plugins/Geography/plugin.py b/plugins/Geography/plugin.py
new file mode 100644
index 000000000..95c66acaa
--- /dev/null
+++ b/plugins/Geography/plugin.py
@@ -0,0 +1,166 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+import datetime
+
+from supybot import conf, utils, plugins, ircutils, callbacks
+from supybot.commands import *
+from supybot.i18n import PluginInternationalization
+
+from . import nominatim
+from . import wikidata
+
+_ = PluginInternationalization("Geography")
+
+
+def timezone_from_uri(irc, uri):
+    try:
+        return wikidata.timezone_from_uri(uri)
+    except utils.time.UnknownTimeZone as e:
+        irc.error(
+            format(_("Could not understand timezone: %s"), e.args[0]),
+            Raise=True,
+        )
+    except utils.time.MissingTimezoneLibrary:
+        irc.error(
+            _(
+                "Timezone-related commands are not available. "
+                "Your administrator need to either upgrade Python to "
+                "version 3.9 or greater, or install pytz."
+            ),
+            Raise=True,
+        )
+    except utils.time.TimezoneException as e:
+        irc.error(e.args[0], Raise=True)
+
+
+class Geography(callbacks.Plugin):
+    """Provides geography facts, such as timezones.
+
+    This plugin uses data from `Wikidata <https://wikidata.org/>`_
+    and `OSM/Nominatim <https://nominatim.openstreetmap.org/>`.
+    """
+
+    threaded = True
+
+    @wrap(["text"])
+    def localtime(self, irc, msg, args, query):
+        """<location name to search>
+
+        Returns the current used in the given location. For example,
+        the name could be "Paris" or "Paris, France". The response is
+        formatted according to supybot.reply.format.time
+        This uses data from Wikidata and Nominatim."""
+        osmids = nominatim.search_osmids(query)
+        if not osmids:
+            irc.error(_("Could not find the location"), Raise=True)
+
+        for osmid in osmids:
+            uri = wikidata.uri_from_osmid(osmid)
+            if not uri:
+                continue
+
+            # Get the timezone object (and handle various errors)
+            timezone = timezone_from_uri(irc, uri)
+
+            if timezone is None:
+                continue
+
+            # Get the local time
+            now = datetime.datetime.now(tz=timezone)
+
+            format_ = conf.supybot.reply.format.time.getSpecific(
+                channel=msg.channel, network=irc.network
+            )()
+
+            # Return it
+            irc.reply(now.strftime(format_))
+
+            return
+
+        irc.error(
+            _("Could not find the timezone of this location."), Raise=True
+        )
+
+    @wrap(["text"])
+    def timezone(self, irc, msg, args, query):
+        """<location name to search>
+
+        Returns the timezone used in the given location. For example,
+        the name could be "Paris" or "Paris, France".
+        This uses data from Wikidata and Nominatim."""
+        osmids = nominatim.search_osmids(query)
+        if not osmids:
+            irc.error(_("Could not find the location"), Raise=True)
+
+        now = datetime.datetime.now(tz=datetime.timezone.utc)
+
+        for osmid in osmids:
+            uri = wikidata.uri_from_osmid(osmid)
+            if not uri:
+                continue
+
+            # Get the timezone object (and handle various errors)
+            timezone = timezone_from_uri(irc, uri)
+
+            if timezone is None:
+                continue
+
+            # Extract a human-friendly name, depending on the type of
+            # the timezone object:
+            if hasattr(timezone, "key"):
+                # instance of zoneinfo.ZoneInfo
+                irc.reply(timezone.key)
+                return
+            elif hasattr(timezone, "zone"):
+                # instance of pytz.timezone
+                irc.reply(timezone.zone)
+                return
+            else:
+                # probably datetime.timezone built from a constant offset
+                try:
+                    offset = timezone.utcoffset(now).seconds
+                except NotImplementedError:
+                    continue
+
+                hours = int(offset / 3600)
+                minutes = int(offset / 60 % 60)
+                irc.reply("UTC+%0.2i:%0.2i" % (hours, minutes))
+                return
+
+        irc.error(
+            _("Could not find the timezone of this location."), Raise=True
+        )
+
+
+Class = Geography
+
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
diff --git a/plugins/Geography/test.py b/plugins/Geography/test.py
new file mode 100644
index 000000000..7cbb7a77b
--- /dev/null
+++ b/plugins/Geography/test.py
@@ -0,0 +1,222 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+import datetime
+import functools
+import contextlib
+from unittest import skipIf
+from unittest.mock import patch
+
+try:
+    import pytz
+except ImportError:
+    pytz = None
+
+try:
+    import zoneinfo
+except ImportError:
+    zoneinfo = None
+
+from supybot.test import *
+from supybot import utils
+
+from . import wikidata
+from . import nominatim
+
+
+def mock(f):
+    @functools.wraps(f)
+    def newf(self):
+        with patch.object(wikidata, "uri_from_osmid", return_value="foo"):
+            with patch.object(nominatim, "search_osmids", return_value=[42]):
+                f(self)
+
+    return newf
+
+
+class GeographyTimezoneTestCase(PluginTestCase):
+    plugins = ("Geography",)
+
+    @skipIf(not pytz, "pytz is not available")
+    @mock
+    def testTimezonePytz(self):
+        tz = pytz.timezone("Europe/Paris")
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertResponse("timezone Foo Bar", "Europe/Paris")
+
+    @skipIf(not zoneinfo, "Python is older than 3.9")
+    @mock
+    def testTimezoneZoneinfo(self):
+        tz = zoneinfo.ZoneInfo("Europe/Paris")
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertResponse("timezone Foo Bar", "Europe/Paris")
+
+    @skipIf(not zoneinfo, "Python is older than 3.9")
+    @mock
+    def testTimezoneAbsolute(self):
+        tz = datetime.timezone(datetime.timedelta(hours=4))
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertResponse("timezone Foo Bar", "UTC+04:00")
+
+        tz = datetime.timezone(datetime.timedelta(hours=4, minutes=30))
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertResponse("timezone Foo Bar", "UTC+04:30")
+
+    @skipIf(not network, "Network test")
+    def testTimezoneIntegration(self):
+        self.assertResponse("timezone Metz, France", "Europe/Paris")
+        self.assertResponse("timezone Saint-Denis, La Réunion", "UTC+04:00")
+
+
+class GeographyLocaltimeTestCase(PluginTestCase):
+    plugins = ("Geography",)
+
+    @skipIf(not pytz, "pytz is not available")
+    @mock
+    def testLocaltimePytz(self):
+        tz = pytz.timezone("Europe/Paris")
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertRegexp("localtime Foo Bar", r".*\+0[12]00$")
+
+    @skipIf(not zoneinfo, "Python is older than 3.9")
+    @mock
+    def testLocaltimeZoneinfo(self):
+        tz = zoneinfo.ZoneInfo("Europe/Paris")
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertRegexp("localtime Foo Bar", r".*\+0[12]00$")
+
+    @skipIf(not zoneinfo, "Python is older than 3.9")
+    @mock
+    def testLocaltimeAbsolute(self):
+        tz = datetime.timezone(datetime.timedelta(hours=4))
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertRegexp("localtime Foo Bar", r".*\+0400$")
+
+        tz = datetime.timezone(datetime.timedelta(hours=4, minutes=30))
+
+        with patch.object(wikidata, "timezone_from_uri", return_value=tz):
+            self.assertRegexp("localtime Foo Bar", r".*\+0430$")
+
+    @skipIf(not network, "Network test")
+    def testLocaltimeIntegration(self):
+        self.assertRegexp("localtime Metz, France", r".*\+0[12]00$")
+        self.assertRegexp("localtime Saint-Denis, La Réunion", r".*\+0400$")
+
+
+class GeographyWikidataTestCase(SupyTestCase):
+    @skipIf(not network, "Network test")
+    def testOsmidToTimezone(self):
+        self.assertEqual(
+            wikidata.uri_from_osmid(450381),
+            "http://www.wikidata.org/entity/Q22690",
+        )
+        self.assertEqual(
+            wikidata.uri_from_osmid(192468),
+            "http://www.wikidata.org/entity/Q47045",
+        )
+
+    @skipIf(not network, "Network test")
+    def testDirect(self):
+        # The queried object directly has a timezone property
+        self.assertEqual(
+            # New York
+            wikidata.timezone_from_uri("http://www.wikidata.org/entity/Q1384"),
+            utils.time.iana_timezone("America/New_York"),
+        )
+
+    @skipIf(not network, "Network test")
+    def testParent(self):
+        # The queried object does not have a TZ property but it is part
+        # of an object that does
+        self.assertEqual(
+            # Metz, France
+            wikidata.timezone_from_uri(
+                "http://www.wikidata.org/entity/Q22690"
+            ),
+            utils.time.iana_timezone("Europe/Paris"),
+        )
+
+    @skipIf(not network, "Network test")
+    def testParentAndIgnoreSelf(self):
+        # The queried object has a TZ property, but it's useless to us;
+        # however it is part of an object that has a useful one."""
+        self.assertEqual(
+            # New York City, NY
+            wikidata.timezone_from_uri("http://www.wikidata.org/entity/Q60"),
+            utils.time.iana_timezone("America/New_York"),
+        )
+
+        self.assertEqual(
+            # Paris, France
+            wikidata.timezone_from_uri("http://www.wikidata.org/entity/Q90"),
+            utils.time.iana_timezone("Europe/Paris"),
+        )
+
+    @skipIf(not network, "Network test")
+    def testParentQualifiedIgnorePreferred(self):
+        # The queried object does not have a TZ property,
+        # and is part of an object that does.
+        # However, this parent's 'preferred' timezone is not the
+        # right one, so we must make sure to select the right one
+        # based on P518 ('applies to part').
+
+        # La Réunion is a French region, but in UTC+4.
+        # France has a bunch of timezone statements, and 'Europe/Paris'
+        # is marked as Preferred because it is the time of metropolitan
+        # France. However, it is not valid for La Réunion.
+        self.assertEqual(
+            # La Réunion
+            wikidata.timezone_from_uri(
+                "http://www.wikidata.org/entity/Q17070"
+            ),
+            datetime.timezone(datetime.timedelta(hours=4)),
+        )
+
+
+class GeographyNominatimTestCase(SupyTestCase):
+    @skipIf(not network, "Network test")
+    def testSearch(self):
+        self.assertIn(450381, nominatim.search_osmids("Metz"))
+
+        results = nominatim.search_osmids("Metz, France")
+        self.assertEqual(results[0], 450381, results)
+
+        results = nominatim.search_osmids("Saint-Denis, La Réunion")
+        self.assertEqual(results[0], 192468, results)
+
+
+# vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:
diff --git a/plugins/Geography/wikidata.py b/plugins/Geography/wikidata.py
new file mode 100644
index 000000000..712fe01a1
--- /dev/null
+++ b/plugins/Geography/wikidata.py
@@ -0,0 +1,158 @@
+###
+# Copyright (c) 2021, Valentin Lorentz
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+#   * Redistributions of source code must retain the above copyright notice,
+#     this list of conditions, and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright notice,
+#     this list of conditions, and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#   * Neither the name of the author of this software nor the name of
+#     contributors to this software may be used to endorse or promote products
+#     derived from this software without specific prior written consent.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+###
+
+import json
+import string
+import datetime
+import urllib.parse
+
+import supybot.utils as utils
+
+from .common import headers
+
+SPARQL_URL = "https://query.wikidata.org/sparql"
+
+TIMEZONE_QUERY = string.Template(
+    """
+SELECT ?item ?itemLabel ?rank ?endtime ?appliestopart ?utcoffset ?tzid (MIN(?area) AS ?min_area) WHERE {
+
+  # find all ?item entities that the subject is part of, recursively;
+  <$subject> (wdt:P131*) ?item.
+
+  # Get all timezones (returns a superset of "?item wdt:P421 ?timezone", as it does not filter on rank)
+  ?item p:P421 ?statement.
+  ?statement ps:P421 ?timezone.
+
+  # TODO: order the final result based on the rank?
+  ?statement wikibase:rank ?rank.
+
+  # fetch the end of validity of the given statement (TODO: check it)
+  OPTIONAL { ?statement pq:P582 ?endtime. }
+
+  {
+    # filter out statements that apply only to a part of ?item...
+    FILTER NOT EXISTS {
+      ?statement pq:P518 ?appliestopart.
+    }
+  }
+  UNION {
+    # ... unless it applies to a part that contains what we are interested in
+    ?statement pq:P518 ?appliestopart.
+    <$subject> (wdt:P131*) ?appliestopart.
+  }
+
+  # Filter out values only valid in certain periods of the year (DST vs normal time)
+  FILTER NOT EXISTS {
+    ?statement pq:P1264 ?validinperiod.
+  }
+
+  # store the identifier of the object the statement applies to
+  BIND(IF(BOUND(?appliestopart),?appliestopart,?item) AS ?statementsubject).
+
+  # Get the area, will be used to order by specificity
+  OPTIONAL { ?statementsubject wdt:P2046 ?area. }
+
+  # Require that ?timezone be an instance of...
+  ?timezone (wdt:P31/wdt:P279*) <$tztype>.
+
+  {
+    # Get either an IANA timezone ID...
+    ?timezone wdt:P6687 ?tzid.
+  }
+  UNION
+  {
+    # ... or an absolute UTC offset
+    ?timezone p:P2907 ?utcoffset_statement.
+    ?utcoffset_statement ps:P2907 ?utcoffset.
+
+    # unless it is only valid in certain periods of the year (DST vs normal time)
+    FILTER NOT EXISTS {                  
+      ?utcoffset_statement pq:P1264 ?utcoffset_validinperiod.
+    }
+  }
+
+  SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
+}
+
+# Deduplicate in case there is more than one ?area statement
+GROUP BY ?item ?itemLabel ?rank ?endtime ?appliestopart ?utcoffset ?tzid
+
+# Get the smallest entities first. As they are more specific,
+# they are more likely to be correct.
+ORDER BY ?min_area DESC(?tzid)
+
+LIMIT 1
+"""
+)
+
+OSMID_QUERY = string.Template(
+    """
+SELECT ?item WHERE {
+  ?item wdt:P402 "$osmid".
+}
+LIMIT 1
+"""
+)
+
+
+def _query_sparql(query):
+    params = {"format": "json", "query": query}
+    url = SPARQL_URL + "?" + urllib.parse.urlencode(params)
+
+    content = utils.web.getUrlContent(url, headers=headers())
+    return json.loads(content)
+
+
+def timezone_from_uri(location_uri):
+    """Returns a :class:datetime.tzinfo object, given a Wikidata Q-ID.
+    eg. ``"Q60"`` for New York City."""
+    for tztype in [
+        "http://www.wikidata.org/entity/Q17272692", # IANA timezones first
+        "http://www.wikidata.org/entity/Q12143", # any timezone as a fallback
+    ]:
+        data = _query_sparql(TIMEZONE_QUERY.substitute(subject=location_uri, tztype=tztype))
+        results = data["results"]["bindings"]
+        for result in results:
+            if "tzid" in result:
+                return utils.time.iana_timezone(result["tzid"]["value"])
+            else:
+                assert "utcoffset" in result
+                utc_offset = float(result["utcoffset"]["value"])
+                return datetime.timezone(datetime.timedelta(hours=utc_offset))
+
+    return None
+
+
+def uri_from_osmid(location_osmid):
+    """Returns the wikidata Q-id from an OpenStreetMap ID."""
+    data = _query_sparql(OSMID_QUERY.substitute(osmid=location_osmid))
+    results = data["results"]["bindings"]
+    for result in results:
+        return result["item"]["value"]
diff --git a/pyproject.toml b/pyproject.toml
index 99248acc8..27271b59c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,4 +5,4 @@ build-backend = "setuptools.build_meta"
 [tool.black]
 line-length = 79
 
-include = 'plugins/(Autocomplete|Fediverse|Poll)/.*\.pyi?$'
+include = 'plugins/(Autocomplete|Fediverse|Geography|Poll)/.*\.pyi?$'