![]() ISO 8601-conformant calendar with week numbers forĪny leap year starting on Saturday (dominical letter BA)Īpplicable years Gregorian Calendar Presented as common in many English-speaking areas Additionally, these types of years are the only ones which contain 54 different calendar weeks (2 partial, 52 in full) in areas of the world where Sunday is considered the first day of the week, and also the only type of year to contain 53 full weekends.Ĭalendars Calendar for any leap year starting on Saturday, This is the only type of year in which all dates (except 29 February) fall on their respective weekdays the minimal 56 times in the 400 year Gregorian Calendar cycle. Independence Day is on a Tuesday, Labor Day is on September 4, Columbus Day is on October 9, Halloween is on a Tuesday, Election Day in the USA is on November 7th, Veterans Day is on a Saturday, Thanksgiving is on November 23, and Christmas is on a Monday. Day is on January 17, Valentine's Day is on a Monday, Presidents Day is on its latest possible date, February 21, the leap day is on a Tuesday, Saint Patrick's Day is on a Friday, Memorial Day is on May 29, Juneteenth is on a Monday, U.S. In this leap year, Martin Luther King Jr. Common years starting on Tuesday share this characteristic, from July of the year that precedes it to September in that type of year. From August of the common year preceding that year until October in this type of year is also the longest period (14 months) that occurs without a Friday the 13th. Common years starting on Sunday share this characteristic, but also have another in January. Īny leap year that starts on Tuesday, Friday or Saturday has only one Friday the 13th: the only one in this leap year occurs in October. The most recent such occurrence was 2000 and the next one will be 2400, see below for more. In the Gregorian calendar, years divisible by 400 are always leap years starting on Saturday. The most recent year kind was 2000 and the next one will be 2028 in the Gregorian calendar or, likewise 20 in the obsolescent Julian calendar. it includes 29 February) that begins on Saturday, 1 January, and ends on Sunday, 31 December. The leap year system makes the calendar coincide with the cycle of the seasons.A leap year starting on Saturday is any year with 366 days (i.e. ![]() So, any year divisible by four is a leap year! (for this centuty). So, we can surely say that: "until 2096, if we want to know if a given year is leap or not, we just need to check if thath year is or is not divisible by 4. For this century, is not necessary to check the other conditions. The year being divisible by 4 is a necessary condition, but not sufficient for a year to be leap, but for this century, we may consider sufficient until the year 2098. 2018 is not divisible 4 (= 504.5), so it will not be a leap year (it is not necessary to check the next two conditions).(It is not necessary to check the third condition) 2020 is not divisible by 100 (= 20.2), so it will be a leap year. ![]() So, we conclude that 2000 was a leap year. 2000 is divisible by 100 (2000/100 = 20), So, it could not have been a leap year, but.It is also divisible by 400 (in this case it will be a leap year).If the year is divisible by 100 (years ending in two zeros), it is not a leap, except if. ![]()
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