In Ireland, leap year is associated with women proposing marriage to men.
If a woman proposes on Leap Day and is turned down, the man must recompense her by purchasing fabric for her skirt.
A satirical newspaper called "La Bougie du Sapeur" is only published once a leap year, on February 29.
Leap years have historically been linked with bad luck, particularly for livestock.
Many Greeks believe that leap years, especially leap days, are unlucky for weddings.
A number of Italians are cautious about leap years, believing that they will bring greater bad luck.
The Russians believe that leap years are inauspicious seasons to marry or buy a house.