1234567890
Unix Time is a system for describing points in time, defined as the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of January 1, 1970, not counting leap seconds. It is neither a linear representation of time nor a true representation of UTC.
On February 13, 2009 at exactly 23:31:30 (UTC), the decimal representation of Unix time was equal to ’1234567890′, a moment celebrated across the world to commemorate 1234567890 Day.