What is a Unix timestamp?
The number of seconds since 00:00:00 UTC on 1 January 1970 (the “Unix epoch”), not counting leap seconds. It is the same everywhere in the world at a given moment. Time zones are applied only when the number is shown as a date. JavaScript and many APIs use milliseconds (13 digits) instead of seconds (10 digits).
India Standard Time (IST) is UTC + 5:30 all year, with no daylight saving.
Frequently asked questions
What is the year 2038 problem?
Systems that store Unix time as a signed 32-bit number overflow at 03:14:07 UTC on 19 January 2038 (timestamp 2,147,483,647). Modern systems use 64-bit time and are not affected.