Unix Epoch
January 1, 1970, 00:00:00 UTC — the start of Unix time (timestamp 0)
Seconds vs Milliseconds
Unix timestamps are typically in seconds. JavaScript uses milliseconds (1000× larger)
Date Format
Use YYYY-MM-DD HH:mm:ss format. Examples: 2024-12-25 09:30:00
Timezone Handling
Choose UTC for server logs or Local for browser-specific times