Current Unix timestamp: seconds or milliseconds?
Both are correct — they’re just different units.
// JavaScript
const ms = Date.now();
const seconds = Math.floor(Date.now() / 1000);Unit safety tips
- Name fields explicitly: created_at_ms or created_at_s.
- Store one canonical unit internally and convert at boundaries.
- Reject impossible ranges in validation.
Related: Seconds vs milliseconds · Timestamp converter
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