If we take today's date 12 October 2014, then we need to count the leap years from 1962: 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008, 2012. 13 leap years of 366 days. From October 5 1962 to the end of 1962 we have 26+30+31=87 days. From January 1 2014 to date we have 31+28+31+30+31+30+31+31+30+12=285 days. Between 1 January 1963 and 31 December 2013 there are 51 years of 365 days + 13 leap days =18,628 days. To this we add 87+285 days making 19,000 days.