
1) American web series 2) Bissextile 3) Calendar phenomenon 4) Calendar term 5) Exclusively Saxon word 6) Exclusively Anglo word 7) Flying time 8) Gregorian Calendar feature 9) Period of 366 days 10) Period with a February 29 11) Period with a February 29th 12) What 1988 was 13) When February 29 comes around
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https://www.crosswordclues.com/clue/leap-year

A leap year (or intercalary or bissextile year) is a year containing one additional day (or, in the case of lunisolar calendars, a month) in order to keep the calendar year synchronized with the astronomical or seasonal year. Because seasons and astronomical events do not repeat in a whole number of days, calendars that have the same number of day...
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http://en.wikipedia.org/wiki/Leap_year

• Bissextile; a year containing 366 days; every fourth year which leaps over a day more than a common year, giving to February twenty-nine days. See Bissextile.
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http://thinkexist.com/dictionary/meaning/leap_year/

Every fourth year, in which a 366th day is added since the Earth's revolution takes 365 days 5 hr 49 min.
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http://www.braeunig.us/space/glossary.htm

year containing some intercalary period, especially a Gregorian year having a 29th day of February instead of the standard 28 days. The astronomical ... [9 related articles]
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http://www.britannica.com/eb/a-z/l/27

• In the Gregorian calendar, a year lasting 366 days rather than 365, with February 29 (leap day) added as the extra day; this occurs in years whose last two digits are evenly divisible by 4; e.g., 1996. • A year with an extra day in any other calendar.
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http://www.daviddarling.info/encyclopedia/L/leap_year.html

Every fourth year, in which a 366th day is added since the Earth's revolution takes 365 days 5 hr 49 min.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
Leap' year` Bissextile; a year containing 366 days; every fourth year which
leaps over a day more than a common year, giving to February twenty-nine days. See
Bissextile . » Every year whose number is divisible by four without a remainder is a leap year, excepting the full centuries, which, to be leap years, ...
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http://www.encyclo.co.uk/webster/L/23

A leap-year is one of the years which contain 366 days, being every fourth year, which leaps over a day more than a common year. Thus in common years, if the first day of March is on Monday the present year, it will the next year fall on Tuesday, but in leap-year it will leap to Wednesday, for a leap-year contains a day more than a common year, a d...
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http://www.probertencyclopaedia.com/browse/AL.HTM

[
n] - in the Gregorian calendar: any year divisible by 4 except centenary years not divisible by 400
Found on
http://www.webdictionary.co.uk/definition.php?query=leap%20year
intercalary year noun in the Gregorian calendar: any year divisible by 4 except centenary years not divisible by 400
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https://www.encyclo.co.uk/local/20974
No exact match found.