One of the mysteries of the English language finally explained.
The intercalary day in a leap year; February 29.
- ‘The calendar was reformed so that a leap day would occur in any year that is divisible by 4 but not divisible by 100 except when the year is divisible by 400.’
- ‘The Roman Republic had a 365 day calendar into which leap days were inserted by a board of priests, whenever it appeared that the calendar was out of synch with the seasons.’
- ‘So every four years a leap day is added to the calendar to allow it to catch up to the solar year.’
- ‘Reform was required because too many leap days are added with respect to the astronomical seasons on the Julian scheme.’
- ‘Step 3: Also, don't count a leap day if it happens after the date that you are calculating.’
- ‘This macro counts the number of leap days up to January 1st of a given year.’
- ‘Leap Years occur every four years, except for years ending in 00, in which case leap day only occurs if the year is divisible by 400.’
- ‘A leap week calendar cannot use the same rules for the leap week as leap day calendar uses for the leap day.’
- ‘That makes today the first leap day for a centurial year since year 1600 and the second such leap day of the Gregorian Calendar.’
- ‘If leap days were not added, the beginnings of months would soon not coincide with the first sighting of the lunar crescent.’
- ‘The extra leap days that were added by the Julian calendar were allowed to remain, so ten days had to be eliminated from 1582 to balance the books.’
- ‘The addition of an extra day to the calendar once in four years defines a leap year, not a leap day, week or month.’
- ‘If a leap day is added every fourth year, the average length of the calendar year is 365.25 days.’
- ‘The following table summarizes the years in which the leap day falls on given weekdays for the years 1900-2100.’
- ‘All we need is seven weekdays to shift until we are back on track again, but with the leap days, it would seem that less than 7 years are needed.’
- ‘To make matters worse, the system was poorly administered and the leap days that should have been excluded from 1704 and 1708 were not excluded.’
- ‘He remembers his mother throwing big birthday parties for him and the two other leapers every time leap day rolled around.’
leap day/ˈlēp ˌdā/
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