leap year
US /ˈliːp jɪr/
UK /ˈliːp jɪr/

1.
anno bisestile
a year, occurring once every four years, which has 366 days including February 29 as an intercalary day
:
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The next leap year will be in 2024.
Il prossimo anno bisestile sarà nel 2024.
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February has 29 days in a leap year.
Febbraio ha 29 giorni in un anno bisestile.