20 including today (in my time zone)
20
20 leap years.
23
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.
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.
Since 1988 is a leap year (divisible by 4), February has 29 days.
182.5 or 183 in a leap year
20 including today (in my time zone)
There are 366 days in a leap year.