Computer Time
Seconds since 1970 (Unix time)
Computers count time as the number of seconds since January 1, 1970. That is Unix time.
What you'll learn from this poster
- What Unix time isStarts at 1970-01-01 (UTC) / Seconds elapsed since then / A worldwide standard
- Seconds and msSeconds by default / 1 second = 1000 ms / Units differ by program
- Time zonesThe number itself is UTC / Display converts per country / Japan is +9 hours
- Year 203832-bit overflows in 2038 / 64-bit fixes it / Count with larger numbers
Time = seconds since 1970
Usage: Free to print and display for learning at school or home (no sign-up). High-resolution portrait PNG (1024×1536); A3 or larger is recommended. Please do not sell, use commercially, or redistribute modified versions.