Timezone Converter Online

Convert times between any timezones instantly — support for all IANA timezone identifiers

What Is Timezone Conversion?

Timezone conversion translates a date and time from one timezone to the equivalent moment in another timezone. The world is divided into over 400 named timezones (identified by IANA names like America/New_York, Europe/London, Asia/Tokyo), each with its own UTC offset that may change seasonally due to daylight saving time transitions. Converting between timezones requires accounting for these offsets and DST rules.

Timezone conversion is essential for scheduling meetings across global teams, coordinating deployment windows in different regions, interpreting server logs from geographically distributed infrastructure, setting up monitoring alerts in local business hours, and any application that serves users across multiple time zones. Incorrect timezone handling causes missed meetings, failed schedules, and data interpretation errors that are notoriously difficult to debug.

How to Convert Between Timezones

1. Enter the date and time you want to convert
2. Select the source timezone from the dropdown (or type to search IANA names)
3. Select the target timezone you want to convert to
4. The equivalent time in the target timezone appears instantly
5. Add multiple target timezones to compare times across several locations simultaneously

Why Use PinusX Timezone Converter?

PinusX converts timezones with 100% client-side processing using the browser's Intl.DateTimeFormat API and the full IANA timezone database. Your time data and scheduling context never leave your browser. This is a privacy-first approach that does not track your timezone queries or meeting schedules. In November 2025, jsonformatter.org leaked over 80,000 user credentials from server-side processing. PinusX avoids this class of risk entirely by running all conversions locally in your browser tab without any server communication.

Frequently Asked Questions

How many timezones are there?

The IANA timezone database contains over 400 timezone identifiers. However, many share the same rules and offset. Approximately 38 distinct UTC offsets are in active use, ranging from UTC-12 to UTC+14. Some offsets use non-standard increments like UTC+5:30 (India), UTC+5:45 (Nepal), and UTC+8:45 (Australia/Eucla).

How does the converter handle daylight saving time?

The converter uses the full IANA timezone database which includes all DST transition rules. When you convert a specific date, the correct DST offset for that date is applied. The converter also warns you when a conversion crosses a DST boundary, which can cause surprising results like an hour appearing to be skipped or repeated.

What is the difference between UTC and GMT?

For practical purposes, UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) are the same — both represent the time at zero degrees longitude with no DST adjustments. Technically, UTC is an atomic time standard while GMT is a timezone. In computing and development, always use UTC as the reference.

What are IANA timezone names?

IANA timezone names follow the format Area/Location (like America/New_York, Europe/Paris, Asia/Tokyo). They are maintained by the IANA Time Zone Database and encode the full history of timezone rules for each location. Always use IANA names in code rather than abbreviations (EST, PST) which are ambiguous across regions.

Why do some timezones have 30 or 45-minute offsets?

Most timezones use whole-hour offsets from UTC, but several use half-hour (India at +5:30, Iran at +3:30, Myanmar at +6:30) or 45-minute (Nepal at +5:45, Chatham Islands at +12:45) offsets. These non-standard offsets were chosen by their respective governments for geographic, political, or practical reasons.

Your data never leaves your browser. 100% client-side processing.