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Why Your Date Shows 1970: Unix Timestamps in Seconds vs Milliseconds

Why Your Date Shows 1970: Unix Timestamps in Seconds vs Milliseconds You fetch a timestamp from an API, pass it to new Date(), and the screen says January 20, 1970.

  • Unix timestamps count seconds or milliseconds since Jan 1, 1970
  • Mistakes from treating seconds as milliseconds or vice versa
  • Use appropriate unit in code to avoid incorrect dates

3 Redis Design Failures You Should Avoid Before They Become Production Incidents

Caching is usually introduced for one simple reason: Take pressure off the database and make reads faster. The architecture often looks straightforward: Client | v Application | +----> Redis | +---->…

  • Stale data occurs when cached copy becomes outdated, serving incorrect information to users.
  • TTL balances performance and consistency, but doesn't guarantee immediate freshness.
  • Cache invalidation upon database updates prevents staleness but adds complexity.

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