Time Zone Converter
Convert between time zones
Frequently Asked Questions
How do I convert time between time zones?
Add or subtract the UTC offset difference. EST (UTC-5) to GMT (UTC+0): add 5 hours. PST (UTC-8) to CET (UTC+1): add 9 hours. The converter accounts for daylight saving time changes automatically.
What is the difference between GMT and UTC?
GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) are functionally the same for most purposes. UTC is the modern standard based on atomic clocks. GMT is a time zone, UTC is a time standard. Both represent +0 offset.
How many time zones are there in the world?
There are 38 time zones ranging from UTC-12 to UTC+14. Some use 30 or 45-minute offsets: India (UTC+5:30), Nepal (UTC+5:45), Chatham Islands (UTC+12:45). The converter handles all standard and non-standard offsets.
What time is it in Tokyo when it is noon in New York?
Tokyo (JST, UTC+9) is 14 hours ahead of New York (EST, UTC-5). Noon in New York = 2:00 AM next day in Tokyo. During EDT (summer), the difference is 13 hours. The converter adjusts for daylight saving.
How does daylight saving time affect time zone conversions?
DST shifts clocks forward 1 hour in spring and back in fall. US DST: March-November. EU DST: March-October. Not all regions observe DST (Arizona, Hawaii, most of Asia/Africa). The converter tracks current DST status.