leap day

基本解释

Every four years a leap day helped keep things on track.
四年一閏，閏年於二月底增加一閏日以保証萬物步入正軌。
When overridden in a derived class, determines whether a date is a leap day.
在衍生類別覆寫時，判斷某個日期是否爲閏日。

Leap Day proposals are said to have originated when St.
FORBES: Commitment Phobic Men Beware: Women Will Propose Marriage Today
Given that this is a Leap Day, and if we were to go by Irish tradition, today gives women the power to ask their beaus, boyfriends and significant others for their hand in marriage.
FORBES: Commitment Phobic Men Beware: Women Will Propose Marriage Today
The Leap Day agreement seemed to send a clear signal that Kim Jong Un intended to see through the easing of tensions with America that North Korea was negotiating in Kim Jong Il's last days.
ECONOMIST: Banyan