These blogs explain the reasoning behind the tools: what unit a timestamp uses, when UTC is sufficient, why local schedules need an IANA timezone, and how seemingly harmless date code becomes an expensive production bug.

Read for the problem. Not the jargon.

  • Start with the timestamp reference when you need a fixed boundary for a query or test.
  • Check JavaScript blogs when Date milliseconds, parsing, Intl, or performance timing are involved.
  • You can check the timezone material when you have a calendar time that must survive daylight-saving changes.
  • You can check the format guides with the number from a platform with a different epoch.

The idea is to give you practical context just before you paste a number into a query, a test fixture or an API payload. The mistakes in units are much more easy to avoid than to explain afterward.