📚 Reference

Time Zone Abbreviations

Common Time Zone Abbreviations

Time zone abbreviations can be confusing because some are used in multiple regions. Here are the most common ones.

North America

EST/EDT — Eastern Standard/Daylight Time (UTC-5/UTC-4). CST/CDT — Central (UTC-6/UTC-5). MST/MDT — Mountain (UTC-7/UTC-6). PST/PDT — Pacific (UTC-8/UTC-7). AKST/AKDT — Alaska (UTC-9/UTC-8). HST — Hawaii Standard (UTC-10, no DST).

Europe

GMT/BST — Greenwich Mean/British Summer (UTC+0/UTC+1). CET/CEST — Central European (UTC+1/UTC+2). EET/EEST — Eastern European (UTC+2/UTC+3). MSK — Moscow (UTC+3).

Asia & Pacific

IST — India Standard (UTC+5:30). CST — China Standard (UTC+8). JST — Japan Standard (UTC+9). KST — Korea Standard (UTC+9). AEST/AEDT — Australian Eastern (UTC+10/UTC+11). NZST/NZDT — New Zealand (UTC+12/UTC+13).

🔧 Time Tools

Time ConverterMeeting PlannerWorld ClockTime Zone ListAbbreviations

🌍 Popular Cities

New YorkLos AngelesChicagoSeattleSan FranciscoMiamiNashvilleDallasDenverAtlantaLondonParisTokyoDubaiSydneySingaporeMumbaiHong Kong

🔄 Popular Conversions

NY→LondonNY→LALondon→TokyoNY→TokyoLondon→DubaiNY→Sydney

Understanding Time Zone Abbreviations

Time zone abbreviations are shorthand codes used to identify specific UTC offsets around the world. Common examples include EST (Eastern Standard Time, UTC-5), PST (Pacific Standard Time, UTC-8), and GMT (Greenwich Mean Time, UTC+0). These abbreviations appear in email headers, meeting invitations, flight itineraries, and broadcast schedules.

Abbreviation ambiguity is a common source of confusion because some codes represent different time zones in different parts of the world. CST can mean Central Standard Time in North America (UTC-6), China Standard Time (UTC+8), or Cuba Standard Time (UTC-5). When precision matters, using the UTC offset or the full IANA timezone name eliminates ambiguity entirely.

During daylight saving periods, most time zones switch to a different abbreviation. EST becomes EDT, PST becomes PDT, and GMT-observing regions that use BST shift to British Summer Time. Our reference table shows both standard and daylight abbreviations for each zone along with the corresponding UTC offset, making it easy to identify any abbreviation you encounter.

About This Tool

This time zone abbreviations resource is designed to provide clear, actionable information. All data and calculations are processed locally in your browser for speed and privacy. We do not collect, store, or transmit any information you enter. Bookmark this page for quick return access whenever you need it.

For the best experience, use this tool on a modern browser with JavaScript enabled. The interface is fully responsive and works on desktop computers, tablets, and mobile phones. Results update in real time as you adjust inputs, allowing you to explore different scenarios quickly without reloading the page or waiting for server responses.

We regularly update our tools and content based on user feedback and changing standards. If you notice any issues, have suggestions for improvement, or would like to see additional features, we encourage you to reach out through the contact information available on our about page. Our goal is to provide the most accurate and user-friendly free tool available in this category, backed by transparent methodology and regular updates from authoritative sources.