Timezone Detecting user's local time at session start When to use - Always at session start (automatically via hook or manually) - When time conversion is needed (calendar, calls, deadlines) - When Claude displays any time to the user How to determine current time This gives the exact time, timezone and UTC offset from the system clock. Rules 1. NEVER guess the timezone -- always query the system clock 2. NEVER convert manually -- use Python with 3. Always display times in the user's local timezone (determined from the system clock) 4. Google Calendar API returns time in the event creation ti…