Unix Timestamps Explained: How Developers Can Work With Them Effectively

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A Unix timestamp is an integer representing the number of seconds elapsed since January 1, 1970 00:00:00 UTC, a reference point known as the Unix Epoch. These timestamps appear widely across software development in REST APIs, JWT tokens, database records, server logs, and authentication sessions. A common pitfall for developers is confusing second-based timestamps with millisecond-based ones, since JavaScript's Date API operates in milliseconds and requires conversion. One key advantage of Unix timestamps is timezone neutrality — they represent a single absolute moment in time, which applications can then render in a user's local timezone. To simplify conversions between Unix timestamps and human-readable dates, a developer built a free browser-based tool called YBS (Your Browser Suite), which requires no sign-up.

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