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Unix & Developer Reference Hub

Curated references for epoch time, precision, and language APIs — deep enough for production debugging.

• Leap seconds

  Why they exist, historical table, and how POSIX vs civil UTC differ.

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• Timestamp precision

  Seconds through nanoseconds, Y2038, and language-level limits.

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• Timestamp formats

  ISO 8601, RFC 3339, Unix seconds, HTTP-Date, and when to use each.

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• C/C++ Unix timestamps

  time_t, struct timespec, and portability across platforms.

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• Go Unix timestamps

  time.Time, monotonic clocks, and JSON marshaling.

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