What is a Unix Timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It's used extensively in programming, databases, and APIs to represent dates and times in a universal, timezone-independent format.
Common Timestamps
0 = Jan 1, 1970. 1000000000 = Sep 9, 2001. 1609459200 = Jan 1, 2021. 2000000000 = May 18, 2033.