diff --git a/README.md b/README.md
index 91c413d..e1c9d8a 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ from moehlenhoff_alpha2 import Alpha2Base
 async def main():
     base = Alpha2Base("192.168.1.1")
     await base.update_data()
+    # Set current date and time in base
+    await base.set_datetime()
+    # Increase the temperature of heatarea by 0.2 degrees
     heat_area = list(base.heat_areas)[0]
     t_target = heat_area["T_TARGET"] + 0.2
     await base.update_heat_area(heat_area["ID"], {"T_TARGET": t_target})
diff --git a/moehlenhoff_alpha2/__init__.py b/moehlenhoff_alpha2/__init__.py
index 3dec590..6cb5b69 100644
--- a/moehlenhoff_alpha2/__init__.py
+++ b/moehlenhoff_alpha2/__init__.py
@@ -10,11 +10,12 @@
 import asyncio
 import aiohttp
 import xmltodict
+from datetime import datetime
 
 
 logger = logging.getLogger(__name__)
 
-__version__ = "1.1.2"
+__version__ = "1.3.0"
 
 
 class Alpha2Base:
@@ -285,3 +286,10 @@ async def update_heat_area(self, heat_area_id: Union[str, int], attributes: dict
         command += "</HEATAREA>"
         async with self._update_lock:
             await self._send_command(device_id, command)
+
+    async def set_datetime(self, value: datetime = None) -> None:
+        """Set base date and time"""
+        value = value or datetime.now()
+        command = f"<DATETIME>{value.strftime('%Y-%m-%dT%H:%M:%S')}</DATETIME>"
+        async with self._update_lock:
+            await self._send_command(self.id, command)
diff --git a/pyproject.toml b/pyproject.toml
index dce1bf2..7a99d84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "moehlenhoff-alpha2"
-version = "1.2.1"
+version = "1.3.0"
 description = "Python client for the Moehlenhoff Alpha2 underfloor heating system"
 authors = ["Jan Schneider <oss@janschneider.net>"]
 license = "GPL"
diff --git a/tests/test_moehlenhoff_alpha2.py b/tests/test_moehlenhoff_alpha2.py
index b4c8577..1cefd87 100644
--- a/tests/test_moehlenhoff_alpha2.py
+++ b/tests/test_moehlenhoff_alpha2.py
@@ -2,6 +2,7 @@
 import os
 import asyncio
 from unittest.mock import patch
+from datetime import datetime
 
 import pytest
 
@@ -113,6 +114,7 @@ async def _fetch_static_data(_self):
 
 
 @pytest.mark.asyncio
+@pytest.mark.skipif(not ALPHA2_BASE_ADDRESS, reason="ALPHA2_BASE_ADDRESS not set in environment")
 async def test_ensure_static_data():
     """Test _ensure_static_data"""
     base = Alpha2Base(ALPHA2_BASE_ADDRESS)
@@ -216,3 +218,23 @@ async def test_update_lock():
         base.update_data()
     ]
     await asyncio.gather(*coros)
+
+@pytest.mark.asyncio
+@pytest.mark.skipif(not ALPHA2_BASE_ADDRESS, reason="ALPHA2_BASE_ADDRESS not set in environment")
+async def test_set_datetime():
+    """Test set datetime"""
+    base = Alpha2Base(ALPHA2_BASE_ADDRESS)
+    await base.update_data()
+
+    value = datetime(2010, 1, 1, 0, 0, 0)
+    await base.set_datetime(value)
+    await asyncio.sleep(5)
+    await base.update_data()
+    base_dt = datetime.strptime(base.static_data["Devices"]["Device"]["DATETIME"], "%Y-%m-%dT%H:%M:%S")
+    assert abs((base_dt - value).total_seconds()) < 10
+
+    await base.set_datetime()
+    await asyncio.sleep(5)
+    await base.update_data()
+    base_dt = datetime.strptime(base.static_data["Devices"]["Device"]["DATETIME"], "%Y-%m-%dT%H:%M:%S")
+    assert abs((base_dt - datetime.now()).total_seconds()) < 10