Date Time UTC Converter
Convert a UTC time or Unix timestamp to any time zone, and check how it will be read.
Runs in your browser. Nothing you enter is uploaded.
If it has no offset, read it as
About Date Time UTC Converter
Date Time UTC Converter helps developers verify time values. Paste a UTC date, an ISO 8601 string or a Unix timestamp, and see the same moment in every time zone you care about, along with its offset and whether daylight saving applies.
It also warns about the local times that cause real bugs. When clocks go forward, some local times never happen. When clocks go back, some happen twice. The converter tells you when your input is one of them, and shows both instants when there are two.
How to use Date Time UTC Converter
- 01Enter a date, a time or a Unix timestamp, or select Now.
- 02If the value has no offset, choose the time zone it should be read in.
- 03Compare the result across your time zones, and copy the format you need.
Features
- Reads ISO 8601, RFC dates, Unix seconds, milliseconds, microseconds and nanoseconds
- Reads .NET ticks and .NET JSON dates
- Warnings for local times that are skipped or repeated by daylight saving
- Rejects impossible dates such as February 31 instead of rolling them over
- Copies ISO 8601, Unix, HTTP date, SQL and .NET tick formats
- Remembers your list of time zones on this device
Frequently asked questions
- How do I convert UTC to my local time?
- Enter the UTC time, ending in Z or with UTC as the source zone. Your own time zone is detected and shown in the results automatically, along with any others you add.
- How does it tell seconds from milliseconds?
- It goes by the size of the number. Up to 11 digits is read as seconds, up to 14 as milliseconds, up to 17 as microseconds, 18 as .NET ticks, and 19 as nanoseconds. The result always states how the value was read.
- What happens with a time that occurs twice during daylight saving?
- When clocks go back, an hour repeats. The converter warns you, shows the first occurrence, and gives the exact time of the second.
- Is a time with no offset treated as UTC?
- It is read in the source time zone you choose, which starts as UTC. A value with its own offset, such as Z or +08:00, always uses that offset instead.
- Is anything I enter sent to a server?
- No. It runs entirely in your browser, and nothing you enter or open is uploaded, stored or sent to a server.