The table below lists every recognized IANA time zone, sorted by UTC offset. You can search by name, filter by region or offset, and click any column header to re-sort. UTC Offset Quick Links Understanding the Time Zone System The world is divided into 24 primary time zones , each offset by roughly one hour from its neighbor. All offsets are measured from Coordinated Universal Time (UTC) , the global standard maintained by atomic clocks. In practice, political boundaries cause time zones to deviate from neat 15-degree strips of longitude. Several countries use half-hour or quarter-hour offsets (India at UTC+5:30, Nepal at UTC+5:45), and more than 38 distinct offsets exist worldwide. IANA Time Zone Database The table above uses identifiers from the IANA Time Zone Database (also called "tz" or "Olson" database). These IDs follow the format Region/City (e.g., America/New_York , Europe/London ) and are the standard used by operating systems, programming languages, and databases to represent time zones unambiguously. The "DST" column indicates whether daylight saving time is currently active in that zone. When DST is active, the displayed UTC offset already includes the DST shift (typically +1 hour from standard time).

What Is a Time Zone? — how time zones were created and how they work How Many Time Zones Are There? — beyond the standard 24 UTC vs GMT — comparing the two global standards World Time Zone Map — visual overview Time Difference Calculator — compare any two cities Current Time Lookup — live clock for any location International Date Line — where the day changes We use cookies to improve your experience. By using this site, you agree to our Privacy Policy .