[Feat]: Tell the agent the current date (#7509)

openhands/memory/memory.py

@@ -1,6 +1,7 @@
 import asyncio
 import os
 import uuid
+from datetime import datetime, timezone
 from typing import Callable
 
 import openhands
@@ -170,6 +171,7 @@ class Memory:
                 else '',
                 microagent_knowledge=microagent_knowledge,
                 content='Added workspace context',
+                date=self.runtime_info.date if self.runtime_info is not None else '',
             )
             return obs
         return None
@@ -263,13 +265,17 @@ class Memory:
     def set_runtime_info(self, runtime: Runtime) -> None:
         """Store runtime info (web hosts, ports, etc.)."""
         # e.g. { '127.0.0.1': 8080 }
+        utc_now = datetime.now(timezone.utc)
+        date = str(utc_now.date())
+
         if runtime.web_hosts or runtime.additional_agent_instructions:
             self.runtime_info = RuntimeInfo(
                 available_hosts=runtime.web_hosts,
                 additional_agent_instructions=runtime.additional_agent_instructions,
+                date=date,
             )
         else:
-            self.runtime_info = None
+            self.runtime_info = RuntimeInfo(date=date)
 
     def send_error_message(self, message_id: str, message: str):
         """Sends an error message if the callback function was provided."""