“January 20 is the 20th day of the year in the Gregorian calender. There are 345 days remaining until the end of the year (346 in leap years). In the ancient astronomy, it was the cusp day between Capricorn and Aquarius. In some years it is Aquarius, but others Capricorn. It depends on the year.”
So if you were wondering why the obsession for 20th of January, it’s simple: That’s my date of birth.
More info at: http://en.wikipedia.org/wiki/January_20