Today is 29th February, which only occurs every four years, in a Leap Year.
Did you know?
In that time, Leap year was referred to as the Bissextile
“Relating to a leap year , when a day is added to February . The Romans added a day after 24 February every fourth year, and called it dies bissextus , ‘twice sixth day’, referring to the (repeated) sixth day before the calends of 1 march ….”
From Brewer’s Dictionary of Phrase and Fable
The Oxford Reference Online is available to residents of NSW with a valid State Library of New South Wales Library card