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.
20 leap years.
As of 2017, there have been 16 leap days since the 10th of February, 1955.
20
Count the years that are multiples of 4: 1948, 1952, 1956...
Since 1966 was not a leap year, February 1966 contained 28 days.
28 days since it is not leap year. You have to be able to divide exactly by 4 to be leap 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.
20 including today (in my time zone)
Since 1988 is a leap year (divisible by 4), February has 29 days.
182.5 or 183 in a leap year
There are 366 days in a leap year.
Since that's a multiple of 4, it's a leap year - hence, it has 366 days.