Unix timestamps explained: definition, utility, and conversion methods

A Unix timestamp represents a specific moment as the number of seconds elapsed since the Unix epoch, which began on January 1, 1970, in UTC. These numeric timestamps are widely used in computing systems like APIs, databases, and logs because computers can easily perform calculations with them. A common point of confusion is that timestamps can be expressed in either seconds or milliseconds, which is often identifiable by the number of digits. Developers convert these timestamps into human-readable dates for debugging or display, a process that must account for timezone differences as the timestamp itself represents an absolute instant.