Bissextus

Bissext, or bissextus (Lat. bis, twice; sextus, sixth) is the day which is added to the Gregorian calendar every fourth year (except those evenly divisible by 100, unless they are divisible by 400) to compensate for the six-hour difference in length between the common 365 day year and the actual length of the solar year.

单词	Bissextus
释义	Bissextus 英语百科 Bissextus Bissext, or bissextus (Lat. bis, twice; sextus, sixth) is the day which is added to the Gregorian calendar every fourth year (except those evenly divisible by 100, unless they are divisible by 400) to compensate for the six-hour difference in length between the common 365 day year and the actual length of the solar year.
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