Free, fast, and accurate time zone converter supporting all major time zones worldwide. No sign-up required — just pick your zones and get instant results. Time Zone Converter Popular Time Zone Conversions These are the most frequently searched time zone conversions. Use our time zone converter to instantly convert between any pair of time zones, or browse the most popular conversions below. Time Zone Tools TimeZoneBase offers a suite of free time zone tools designed for remote workers, travelers, and international business professionals. Each tool provides instant, accurate results with no sign-up required. Understanding Time Zones: A Complete Guide Time zones are regions of the globe that observe the same standard time. The world is divided into 24 major time zones, each offset from Coordinated Universal Time (UTC) by a specific number of hours. Understanding how time zones work is essential for anyone scheduling international meetings, booking flights, or coordinating with remote teams across the globe. The United States spans multiple time zones, making cross-country scheduling a daily challenge for millions of professionals. The four primary US time zones are Eastern Standard Time (EST) , Central Standard Time (CST) , Mountain Standard Time (MST) , and Pacific Standard Time (PST) . During daylight saving time (March through November), these become EDT, CDT, MDT, and PDT respectively. The most common US conversion is EST to PST , which involves a 3-hour difference. When it is noon in New York (EST), it is 9:00 AM in Los Angeles (PST). Other popular US conversions include EST to CST (1-hour difference), CST to PST (2-hour difference), and EST to MST (2-hour difference). For professionals scheduling across the country, our time zone converter makes these calculations instant. If you need a specific conversion like 10 AM EST to MST or 10 AM PDT to CST , our specific time converter gives you the answer immediately with additional context about business hours and scheduling tips. European Time Zones Central European Time (CET) and Greenwich Mean Time (GMT) are the two most important European time zones for international business. CET is UTC+1 and covers most of mainland Europe — Germany, France, Spain, Italy, Netherlands, and more. GMT (UTC+0) covers the United Kingdom and Ireland. During summer, these shift to CEST (UTC+2) and BST (UTC+1). Transatlantic scheduling between Europe and the US is one of the most common use cases for our converter. The CET to EST conversion shows a 6-hour difference, while GMT to EST has a 5-hour gap. When European offices open at 9 AM CET, it is only 3 AM EST — which is why finding the overlap window matters. Use our London to New York time difference page or Paris to New York time difference page for detailed scheduling advice. Asia-Pacific Time Zones The Asia-Pacific region includes some of the world’s most offset time zones relative to the Americas. Japan Standard Time (JST) is UTC+9, Indian Standard Time (IST) is UTC+5:30, Singapore Time (SGT) is UTC+8, and Australian Eastern Standard Time (AEST) is UTC+10. These large offsets make real-time collaboration challenging but not impossible. For teams spanning the US and Asia, conversions like EST to JST (14-hour difference), PST to AEST (18-hour difference), and EST to IST (10.5-hour difference) are essential. Our converter tool handles all of these instantly, including when the conversion spans midnight and shifts to the next or previous day. Daylight Saving Time (DST) Daylight saving time adds complexity to time zone conversions because different countries change their clocks on different dates. The US transitions in March and November, Europe in March and October, and Australia in April and October. During the weeks when one region has changed but another has not, the usual offset temporarily shifts by one hour. Read our comprehensive guide on daylight saving time explained for a detailed breakdown of how DST affects global scheduling. Some regions do not observe DST at all. Arizona (MST), Hawaii (HST), and most countries near the equator stay on their standard time year-round. This means conversions like MST to PST can vary between 1 and 2 hours depending on the time of year, which our converter handles automatically. Time Zone Conversions for Remote Workers The rise of remote work has made time zone conversion an everyday necessity. Whether you are a freelancer working with clients in different countries, a distributed team spanning multiple continents, or a digital nomad traveling while working, understanding time differences is critical for productivity and professionalism.

Our guide to scheduling meetings across time zones provides actionable strategies for finding optimal meeting times. For teams spanning more than 8 hours of difference, asynchronous communication tools become essential. Learn more about the best time zone converter tools on our blog. Military Time and 24-Hour Clock Many international organizations use the 24-hour clock (military time) to eliminate AM/PM confusion in cross-timezone communication. Instead of saying “3 PM EST,” you would say “1500 EST,” which removes any ambiguity — especially important in aviation, healthcare, military, and logistics where time errors can be costly. Our converter supports both 12-hour and 24-hour formats. Learn more in our guide on what is military time . Time Difference Between Major Cities Beyond abstract time zone abbreviations, many people search for the time difference between specific cities. Our tool provides exact offsets between major city pairs with scheduling recommendations. Popular Specific Time Conversions Need to know what a specific time converts to in another zone? These are the most searched specific time conversions . Click any to see the instant result with scheduling context. More Time Zone Conversions Browse our complete collection of time zone conversions covering all major zone pairs. Here are additional popular conversions organized by region. US to Asia-Pacific Europe to Asia-Pacific Time Zone Guides & Articles Visit our time zone blog for in-depth articles on daylight saving time, scheduling best practices, UTC explained, and more. Our guides are written for professionals, travelers, and anyone who needs accurate, practical time zone knowledge. About TimeZoneBase TimeZoneBase is a free online tool designed to make time zone conversion simple and instant. We support all major time zones used in business, travel, and daily life — including US zones ( EST , EDT , CST , CDT, MST , MDT, PST , PDT), European zones ( CET , CEST, GMT , BST), and international zones ( IST , SGT , JST , AEST , UTC). Every conversion page includes a complete 24-hour time table , daylight saving time information, related conversions, and links to authoritative external resources. Whether you need the time difference between California and New York , want to find what time 10 AM EST is in MST , or are looking for tips on scheduling across time zones , TimeZoneBase has you covered. Our goal is to be the most comprehensive and user-friendly time zone reference on the web — completely free, with no registration required. References & Resources TimeAndDate.com — World Time Zones NIST — Official US Time Standard IANA Time Zone Database Wikipedia — Time Zone Abbreviations WorldTimeServer — Current Times Worldwide