Time Zone Converter
Convert a time from one UTC offset to another and see the day change if applicable.
The Time Zone Converter converts a clock time from one UTC offset to another. It handles day boundary crossings and also shows the equivalent UTC time.
How It Works
Enter the time (in 24-hour format), the source time zone as a UTC offset (e.g., -5 for EST, +1 for CET), and the target UTC offset. The calculator converts the time and indicates if the date changes (+1 or -1 day).
Common UTC Offsets
- UTC-8: PST (Los Angeles)
- UTC-5: EST (New York)
- UTC+0: GMT (London, winter)
- UTC+1: CET (Paris, Berlin, winter)
- UTC+8: CST (Beijing, Singapore)
- UTC+9: JST (Tokyo)
This tool uses UTC offsets rather than named time zones because named zones change with daylight saving time. Check whether your region is currently observing DST to use the correct offset.
Frequently Asked Questions
What is a UTC offset?
A UTC offset is the number of hours ahead (+) or behind (-) Coordinated Universal Time. For example, New York (EST) is UTC-5, meaning 5 hours behind UTC.
How do I know which UTC offset to use?
Search for your city's current UTC offset. Remember that it may change with daylight saving time (e.g., New York is UTC-5 in winter/EST and UTC-4 in summer/EDT).
What does day offset mean?
If the converted time crosses midnight, the day offset shows +1 (next day) or -1 (previous day). For example, 23:00 UTC-5 converted to UTC+1 is 05:00 the next day (day offset = +1).