A Unix timestamp is the number of seconds since 00:00:00 UTC on January 1, 1970, not counting leap seconds. Computers use it because one number means the same moment everywhere.
Unix timestamp converter
Paste a timestamp, or pick a date and time.
Seconds or milliseconds?
Ten digits is seconds (1798761600). Thirteen digits is milliseconds (1798761600000), which JavaScript and many APIs use.
Time zones
A timestamp has no time zone; it is the same moment everywhere. The converter shows it in UTC and in your device’s local time.
Frequently asked questions
What is epoch time?
Seconds since 00:00:00 UTC on January 1, 1970.
What timestamp is January 1, 2027?
1798761600 at midnight UTC.
What is the year 2038 problem?
Older systems store timestamps as a signed 32-bit number, which runs out on January 19, 2038.