According to legend, Columbus, looking at an astronomical almanac compiled by a German mathematician, realized that a total eclipse of the moon would occur on Feb. 29, 1504.

据传说，哥伦布查阅了一位德国数学家编撰的天文年历，发现1504年2月29日将会发生一次月全食。

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Feb. 29 is an intercalary day; leap year is an intercalary year.

2月29日是闰日；闰年是有添加日的年份。

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The last time the central bank cut RRR was Feb. 29, 2016.

中国人民银行上次降低存款准备金率还是在2016年的2月29日。

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Companies' monthly financial reports may run fine for years, then crash in February of a leap year when software tries to compare Feb. 29, 2012, to a nonexistent Feb. 29, 2011.

WSJ: For Some, All in a Leap Day's Work

"Our stance is to proceed with the U.S.-North Korea agreement reached on Feb. 29, " he said.

WSJ: China Seeks Peacemaker Role on North Korea

Lawyers and other professionals will bill added hours on Feb. 29 although not all need a leap year for that.

WSJ: For Some, All in a Leap Day's Work