1969?
Yeah, maybe....come to think of it.
Unix-based computer systems reckon time as the number of seconds since midnight 1 Jan 1970 GMT. West of Greenwich, a date of zero seconds falls in 1969. E.g.,
$ python -c "import time;print time.strftime('%Y-%m-%d %H:%M:%S %Z', time.localtime(0))" 1969-12-31 19:00:00 EST