MCP Time Server Node

# Native JavaScript Timezone Validation Options (Tested 2025-07-18) 1. **Intl.supportedValuesOf('timeZone')** - Returns array of 428 valid IANA timezones - Requires Node 14.18+ - Always accurate to runtime environment 2. **Intl.DateTimeFormat with try/catch** - Throws exception for invalid timezones - Works on older Node versions - Good for validation 3. **getTimezoneOffset from date-fns-tz** - Returns NaN for invalid timezones - Already in our dependency stack - Fast and reliable