All Time Zones — Complete List
Browse all major time zones worldwide. Click any zone to see current time, UTC offset, DST schedule, and cities.
Time Zones by Abbreviation
- Australian Eastern Standard Time (aest) — UTC+10
- Alaska Standard Time (akst) — UTC-9
- Brasilia Time (brt) — UTC-3
- Central European Time (cet) — UTC+1
- Central Standard Time (cst) — UTC-6
- China Standard Time (cst-china) — UTC+8
- Eastern European Time (eet) — UTC+2
- Eastern Standard Time (est) — UTC-5
- Greenwich Mean Time (gmt) — UTC+0
- Hawaii Standard Time (hst) — UTC-10
- India Standard Time (ist) — UTC+5:30
- Japan Standard Time (jst) — UTC+9
- Korea Standard Time (kst) — UTC+9
- Moscow Standard Time (msk) — UTC+3
- Mountain Standard Time (mst) — UTC-7
- Pacific Standard Time (pst) — UTC-8
- Coordinated Universal Time (utc) — UTC+0
Frequently Asked Questions
How many time zones are there?
There are 38 time zones in use worldwide (including UTC). This page covers the 17 most common zones used by businesses and travelers.
What is UTC?
Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks. It replaced Greenwich Mean Time (GMT) as the reference in 1972.
Why do time zones observe DST?
Daylight saving time (DST) moves clocks forward in summer to extend evening daylight. Not all countries observe it — equatorial regions typically don't change clocks.