Time Zone Converter
Convert time instantly between 400+ global time zones. Automatically handles Daylight Saving Time (DST) for accurate scheduling.
Why Time Zones Exist
Before standardized time zones, every city set its clocks based on local solar time — noon was when the sun was highest in the sky. This worked when travel was slow, but the railroad era made it chaotic: a journey across a country could cross dozens of local times. In 1884, the International Meridian Conference established 24 standard time zones based on the Greenwich Meridian, each approximately 15 degrees of longitude wide.
Today, time zones are defined by countries and regions rather than strict geographic lines, which is why some zones are offset by 30 or 45 minutes rather than full hours — India (UTC+5:30) and Nepal (UTC+5:45) are well-known examples. Pakistan Standard Time is UTC+5, with no Daylight Saving Time observed.
Daylight Saving Time Explained
Daylight Saving Time (DST) is the practice of advancing clocks by one hour during warmer months to extend evening daylight. Not all countries observe DST — most of Asia, Africa, and parts of South America do not. The United States, Canada, and most of Europe do. This means that the time difference between two locations can change by an hour depending on the time of year.
This converter uses the browser's built-in Intl.DateTimeFormat API, which automatically accounts for DST transitions. If you are scheduling a meeting with someone in New York in March, the converter correctly applies the DST change — no manual adjustment needed.
Tips for Scheduling Across Time Zones
- Always confirm which time zone a scheduled time refers to — "3 PM" is meaningless without a zone.
- Use UTC when communicating with technical teams — it never changes and has no DST ambiguity.
- For recurring meetings, schedule them in the local time of the majority of participants and note the conversion for others.
- Be aware of the international date line — scheduling a call at 9 AM Monday in New York means it is Tuesday morning in Sydney.
- Calendar apps like Google Calendar automatically handle time zone conversion for events — use them for meetings rather than mental arithmetic.
Knowledge Base
The Time Zone Converter is a free online tool to calculate the exact time difference between any two locations globally. Perfect for scheduling international Zoom meetings, coordinating with remote teams, or planning travel across time zones. It uses your browser's native Intl API to automatically account for Daylight Saving Time (DST) changes.
- 1Enter the date and time you want to convert in the 'From' section.
- 2Select your source time zone (e.g., EST / New York).
- 3Select your target time zone (e.g., PKT / Karachi).
- 4View the exact converted time and the hour difference instantly.
No sign-up required and 100% client-side. Unlike other tools cluttered with ads, our converter uses zero external API calls. It works entirely offline using your device's secure time zone database, ensuring your scheduling data remains 100% private and loads instantly.
Does this tool account for Daylight Saving Time (DST)?
Yes. The converter uses your browser's native time zone engine, which automatically adjusts for DST shifts in regions that observe it (like the US, UK, and Europe).
How many time zones are supported?
It supports over 400 IANA time zones (e.g., Asia/Karachi, America/New_York), covering every city and region globally.
Can I use this offline?
Yes! Because it uses your browser's built-in time zone database and not an external API, it works perfectly even without an internet connection.