2004 UTC Calendar

This is the complete UTC calendar for 2004 on timestamp.is. Click any day to see its Unix timestamp at midnight UTC — the standard reference point for epoch conversion. The year 2004 contains 366 days and spans timestamps 1072915200 through 1104537599.

How to use this calendar

Select any date in the grid above. The info bar shows the Unix timestamp for 00:00:00 UTC on that day — the moment the calendar date begins in epoch time. For other times (noon, end of day), use the converter or open the full timestamp page for that second.

Jump to month: January · February · March · April · May · June · July · August · September · October · November · December

2004 in computing history

• Facebook founded — created_at columns everywhere
• Git version control created by Linus Torvalds

Every day in 2004 has a Unix timestamp

Developers auditing logs from 2004 need quick day-to-timestamp lookup. This calendar eliminates manual calculation: January 1 2004 is 1072915200, December 31 2004 00:00 UTC is 1104451200. Share https://timestamp.is/calendar/2004 in documentation, runbooks, or Stack Overflow answers.

All calculations use UTC — no daylight saving, no timezone ambiguity. This matches how servers, databases, and APIs store time internally before converting to local display.

Related pages

• 2004 year reference — start/end timestamps and overview
• Time zone converter — convert UTC to local zones
• Epoch converter — any date/time to Unix