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docker/routlin-dash/app/settings.py

@@ -31,6 +31,16 @@ def get_host_utc_offset():
     return time.localtime().tm_gmtoff
 
 
+def get_client_utc_offset(timezone_str):
+    """Return signed integer UTC offset in seconds for the given IANA timezone string."""
+    try:
+        from zoneinfo import ZoneInfo
+        from datetime import datetime
+        return int(datetime.now(ZoneInfo(timezone_str)).utcoffset().total_seconds())
+    except Exception:
+        return get_host_utc_offset()
+
+
 def get_host_timezone():
     """Return the host timezone name (e.g. 'America/New_York'), or '' if unknown."""
     tz = os.environ.get('TZ', '').strip()