diff --git a/mosfet/bot.py b/mosfet/bot.py
index c298c14..0fe6483 100644
--- a/mosfet/bot.py
+++ b/mosfet/bot.py
@@ -420,6 +420,9 @@ def start_automation(global_state, initialize=True):
     g.protocol_version = 777
     if initialize:
         g.time = 0.0
+        g.time_base = None
+        g.time_update_received_at = None
+        g.clock_rate = 1.0
         g.path = []
         g.look_at = None
         g.y_v = 0.0
@@ -505,6 +508,9 @@ def start_automation(global_state, initialize=True):
                g.get('connection') and g.connection.connected):
             started = time.monotonic()
             now = time.monotonic()
+            game = g.get('game')
+            if game is not None:
+                game._advance_world_time()
             if not initial_world_ready:
                 if not bot.missing_movement_chunks(g):
                     if loaded_since is None:
diff --git a/mosfet/commands.py b/mosfet/commands.py
index ea34c85..f26dd41 100644
--- a/mosfet/commands.py
+++ b/mosfet/commands.py
@@ -221,7 +221,7 @@ class Commands:
                 seconds = self.g.time * 3.6
                 start = datetime(2000, 1, 1, hour=6)
                 mctime = start + timedelta(seconds=seconds)
-                reply = str(self.g.time) + ' - ' + mctime.strftime('%I:%M %p')
+                reply = str(int(self.g.time)) + ' - ' + mctime.strftime('%I:%M %p')
 
             ## !count [id] - counts the number of items with that id
             if command == 'count' and data:
diff --git a/mosfet/game.py b/mosfet/game.py
index f8cb8e5..60b99ea 100644
--- a/mosfet/game.py
+++ b/mosfet/game.py
@@ -179,9 +179,24 @@ class LegacyGame:
         self.g.holding = (item.item_id if item and
                           getattr(item, 'present', False) else 0)
 
+    def _set_world_clock(self, total_ticks, partial_tick=0.0, rate=1.0):
+        self.g.time_base = float(total_ticks) + float(partial_tick)
+        self.g.clock_rate = float(rate)
+        self.g.time_update_received_at = time.monotonic()
+        self._advance_world_time()
+
+    def _advance_world_time(self):
+        received_at = self.g.get('time_update_received_at')
+        time_base = self.g.get('time_base')
+        if received_at is None or time_base is None:
+            return
+        elapsed_ticks = max(0.0, time.monotonic() - received_at) / utils.TICK
+        self.g.time = (time_base + elapsed_ticks *
+                       self.g.get('clock_rate', 1.0)) % 24000
+
     def handle_time_update(self, packet):
         if hasattr(packet, 'time_of_day'):
-            self.g.time = packet.time_of_day % 24000
+            self._set_world_clock(packet.time_of_day)
             return
 
         updates = getattr(packet, 'clock_updates', ())
@@ -201,11 +216,12 @@ class LegacyGame:
                 'minecraft:') in (dimension, 'overworld')
         ]
         update = preferred[0] if preferred else updates[0]
-        self.g.time = update['total_ticks'] % 24000
         self.g.clock_id = update['clock_id']
         self.g.clock_name = clock_names.get(update['clock_id'])
-        self.g.clock_rate = update['rate']
         self.g.world_age = packet.age
+        self._set_world_clock(update['total_ticks'],
+                              update.get('partial_tick', 0.0),
+                              update.get('rate', 1.0))
 
     def handle_set_slot(self, packet):
         g = self.g
@@ -700,6 +716,10 @@ class Game(LegacyGame):
         self.g.connection.register_packet_listener(
             self.handle_set_held_slot, SetHeldSlotPacket)
 
+        self.g.setdefault('time_base', None)
+        self.g.setdefault('time_update_received_at', None)
+        self.g.setdefault('clock_rate', 1.0)
+
         if not self.g.get('health_update_received', False):
             self.g.health = None
             self.g.food = None
@@ -1222,6 +1242,7 @@ class Game(LegacyGame):
             self.g.drain_dropped), flush=True)
 
     def tick(self):
+        self._advance_world_time()
         self._tick_single_drop()
         if self.g.get('dumping') is not None:
             self._tick_dump()
diff --git a/tests/test_sleep_with_bed.py b/tests/test_sleep_with_bed.py
index c935e53..7ebbe21 100644
--- a/tests/test_sleep_with_bed.py
+++ b/tests/test_sleep_with_bed.py
@@ -1,6 +1,7 @@
 import io
 import unittest
 from contextlib import redirect_stdout
+from unittest.mock import patch
 
 from munch import Munch
 from minecraft.networking.packets import PacketBuffer
@@ -96,6 +97,33 @@ class TestSleepWithBed(unittest.TestCase):
             'partial_tick': 0.5, 'rate': 1.0,
         }])
 
+    def test_game_advances_world_clock_between_server_updates(self):
+        game = Game.__new__(Game)
+        game.g = Munch(
+            time_base=None, time_update_received_at=None, clock_rate=1.0,
+            time=0.0,
+            connection=Munch(registry_ids={'minecraft:world_clock': {
+                'minecraft:the_end': 1,
+                'minecraft:overworld': 0,
+            }}),
+            dimension='overworld')
+        packet = Munch(age=900000, clock_updates=[
+            {'clock_id': 1, 'total_ticks': 6000,
+             'partial_tick': 0.0, 'rate': 1.0},
+            {'clock_id': 0, 'total_ticks': 13000,
+             'partial_tick': 0.5, 'rate': 1.0},
+        ])
+
+        with patch('mosfet.game.time.monotonic', return_value=100.0):
+            game.handle_time_update(packet)
+            self.assertEqual(game.g.time, 13000.5)
+            self.assertEqual(game.g.clock_name, 'minecraft:overworld')
+
+        with patch('mosfet.game.time.monotonic', return_value=100.5):
+            game._advance_world_time()
+
+        self.assertEqual(game.g.time, 13010.5)
+
     def test_player_command_encodes_stop_sleeping(self):
         packet = PlayerCommandPacket(
             entity_id=7, action_id=0, jump_boost=0)