diff --git a/requirements.txt b/requirements.txt
index df87bde..8ba4066 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
+dateutil
 irc
 requests
diff --git a/rerunbot.py b/rerunbot.py
index ea379cb..315b4c9 100644
--- a/rerunbot.py
+++ b/rerunbot.py
@@ -6,6 +6,7 @@ import os
 import re
 import unicodedata
 
+import dateutil.parser
 import irc.bot
 import requests
 
@@ -22,7 +23,7 @@ class ReplayBot(irc.bot.SingleServerIRCBot):
         self.config.read('settings.cfg')
         self.supported_commands = [
             (re.compile(r'^!load\s+(?P<id>\d+)$'), self._do_load),
-            (re.compile(r'^!start$'), self._do_start),
+            (re.compile(r'^!start(\s+(?P<at>.+))?$'), self._do_start),
             (re.compile(r'^!stop$'), self._do_stop),
         ]
         self.messages = []
@@ -102,15 +103,18 @@ class ReplayBot(irc.bot.SingleServerIRCBot):
         else:
             send_response('@{0}: failed to load messages'.format(tags['display-name']))
 
-    def _do_start(self, tags, send_response, **kwargs):
+    def _do_start(self, tags, send_response, at=None, **kwargs):
         if int(tags['user-id']) != self.control_user:
             send_response('Sorry @{0}, you are not allowed to do this'.format(tags['display-name']))
             return
-        now = datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)
+        if at is None:
+            t = datetime.datetime.now().astimezone(tz=None)
+        else:
+            t = dateutil.parser.parse(at).astimezone(tz=None)
         for offset, user, msg in self.messages:
             def cb(user=user, msg=msg):
                 return self._post_message(user, msg)
-            self.reactor.scheduler.execute_at(now + offset, cb)
+            self.reactor.scheduler.execute_at(t + offset, cb)
 
     def _do_stop(self, tags, send_response, **kwargs):
         if int(tags['user-id']) != self.control_user: