This Valentines Day at precisely 00:31:30 CET (which is technically the day before Valentines in the USA), the Unix time will be 1234567890. Unix time is measured in the number of seconds elapsed since midnight (UTC) of January 1, 1970.

Further reading:

• Advanced Linux Programming
• Playing Tetris and Pong with Emacs
• Gustavo Duarte on the Anatomy of a Program in Memory
• Blogging from the Command-Line
• Lazy Linux: 10 Essential tricks for admins