Use Mountain Time for all timestamps and dates

agents/weather_briefing.py

@@ -8,9 +8,12 @@ Logs run to the Agent Dashboard API.
 import json
 import os
 import sys
-from datetime import datetime, timezone
+from datetime import datetime, timezone, timedelta
+from zoneinfo import ZoneInfo
 from urllib import request, error, parse
 
+MT = ZoneInfo("America/Denver")
+
 # --- Config ---
 DASHBOARD_API = os.environ.get("DASHBOARD_API", "http://localhost:8550")
 AGENT_ID = "weather-briefing"
@@ -65,7 +68,7 @@ def fetch_weather():
 
 def format_briefing(weather):
     """Format weather data into markdown."""
-    now = datetime.now()
+    now = datetime.now(MT)
     date_str = now.strftime("%A, %B %d, %Y")
 
     current = weather["current"]
@@ -186,7 +189,7 @@ def main():
         weather = fetch_weather()
 
         print("Formatting briefing...")
-        date_str = datetime.now().strftime("%Y-%m-%d")
+        date_str = datetime.now(MT).strftime("%Y-%m-%d")
         markdown, summary = format_briefing(weather)
 
         print("Posting to wiki...")