Popular UNIX times and dates you might not know.

• Birth of Christ:-62136288561 epoch time.
• First Unix Epoch:Dennis Ritchie and others at Bell Labs decide the zero date for Unix will be 00:00:00 UTC on 1 January 1970. The problem with this definition though, is that UTC did not exist in its current form until 1972.
• NTP epoch loop:At 06:28:16 UTC on Thursday, 7 February 2036, (2085955200 epoch time) Network Time Protocol will loop over to the next epoch, as the 32-bit time stamp value used in NTP (unsigned, but based on 1 January 1900) will overflow. This date is close to the following date because the 136-year range of a 32-bit integer number of seconds is close to twice the 70-year offset between the two epochs.
• Last 64-bit time stamp:At 15:30:08 UTC on Sunday, 4 December of 292277026596, 64-bit versions of the Unix time stamp would cease to work, as it will overflow the largest value that can be held in a signed 64-bit number. This is nearly 22 times the estimated current age of the universe, which is 1.37×1010 years (13.7 billion).

Fuente: