20 leap years.
20 including today (in my time zone)
From 1933 to 2012, there have been 19 leap years. 1932 was a leap year but the next one wasn't until 1936.
As of 2017, there have been 16 leap days since the 10th of February, 1955.
23
There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012There have been 15 leap years since 1955:195619601964196819721976198019841988199219962000200420082012
Including 2012 itself, there have been 20 leap days from 1933 to 2012. They were in the years: 1936 1940 1944 1948 1952 1956 1960 1964 1968 1972 1976 1980 1984 1988 1992 1996 2000 2004 2008 2012
It is 2012, 2012 divided by 4 (for every four years a leap year happens) 503. if you want them since the first leap year, you're out of luck.
Up to 2015, there have been 16 leap days since 1948. They were in the years 1952, 1956, 1960, 1964, 1968, 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008 and 2012.
Because a year has 365 days (or 366 in a leap year) and a week has 7 days. 7 does not divide into 365 or 366. The remainder of 1 in a non-leap year means that your birthday will be one day of the week later if there has not been a leap day since your previous b-day. A remainder of 2 in a leap year means that your birthday will be two days of the week later if there has been a leap day since your previous b-day. The reason for using leap days instead of leap years in the last paragraph is that birthdays that fall before the leap day (1 January-28 February) are affected by leap years in the PREVIOUS year.
366. 1940 is a leap year, since it is divisible by 4.366. 1940 is a leap year, since it is divisible by 4.366. 1940 is a leap year, since it is divisible by 4.366. 1940 is a leap year, since it is divisible by 4.
As of 2011, the leap years since 1986 have been: 1988 1992 1996 2000 2004 2008 This is a total of six leap years.