Scientists tell couples not to marry on a leap day.
科学家告诉情侣们不要在闰日结婚。
Indeed, the day of the week for a given date progresses by one annually, except on leap years, where it progresses by two.
确实，对于一个给定的日期，每年属于哪个星期几总是后移一天，闰年除外，后移两天。
This is more of an issue in the far east, where the leap second occurs in the middle of the day, and when one is inserted at the end of June and hence often on a working day.
这在远东地区更成问题，在那些地区，闰秒发生在一天的中间时段。
Every four years a leap day helped keep things on track.
四年一闰，闰年于二月底增加一闰日以保证万物步入正轨。
Every four years a leap day helped keep things on track.
四年一闰，闰年于二月底增加一闰日以保证万物步入正轨。
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