| skos:altLabel | - additional
- seven
- leap
- February 29
- 29 February
- Leap Day
- leap day
- Leap
- Leap Year
- leap year
- Jewish leap year
- leap-year
- 'leap day'
- 365  day year length
- 400 year leap year rule
- Feb 29
- February 29th
- Leap Year Algorithm
- Leap Year Day
- Leap day
- Leap year#Birthdays
- Leap year#Leap day
- \"leap\" years
- add a day
- calculation rules
- intercalary years
- leap cycle
- leap days
- leap one
- leap year algorithm
- leap years
- leap years of the Hebrew calendar
- leap years on the Hebrew calendar
- leap-year's day
- traditional day for a woman to propose
- year (leap)
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