About IANA Time Zone Database & Intl Helper
Complete canonical IANA Time Zone Database (tz database / Olson database) reference directory. Look up standard Area/Location identifiers (e.g. America/New_York, Europe/London, Asia/Tokyo), inspect live current times, standard offsets, and generate copy-pasteable JavaScript Intl.DateTimeFormat code snippets.
Key Capabilities & Features
- Comprehensive catalog of canonical IANA time zone identifiers across all continents
- Real-time live clocks showing current local time and date in each IANA zone
- Standard UTC offset and Daylight Saving Time (DST) tracking
- Automated JavaScript Intl.DateTimeFormat snippet generator for developers
- 1-click copy for canonical zone strings and programming code
How to Use IANA Time Zone Database & Intl Helper
Search IANA Identifier
Type a canonical zone identifier like America/Chicago or Asia/Kolkata.
Filter by Continent
Browse zones by Americas, Europe, Asia, Africa, or Oceania.
Inspect Live Time
View the live ticking time formatted according to local zone rules.
Copy Intl Snippet
Copy the ready-to-run JavaScript snippet to handle timezones in web apps.
Privacy & In-Browser Execution Guarantee
100% Client-Side. IANA database queries and Intl code snippets are generated locally.
Frequently Asked Questions
Why does the web use IANA time zone names instead of UTC offsets?
UTC offsets change throughout the year due to Daylight Saving Time (DST) and government policy changes. Canonical IANA identifiers (like America/New_York) encapsulate the complete historical and future offset rules.
How do I format time in a specific IANA time zone in JavaScript?
Use new Intl.DateTimeFormat("en-US", { timeZone: "America/New_York" }).format(new Date()). It handles DST transitions automatically.