The ecclesiastical "vernal equinox" is always on March 21.

另外，基督教的“春分”通常是3月21日。

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The“Composite Air Operations” were planned for the period of March 21-25, 2011.

“综合空中行动”计划在2011年3月21到25号期间展开。

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8A man swims in a pool inside a condominium in Singapore March 21, 2010. (REUTERS/Nicky Loh)

2010年3月21日，在新加坡的公寓游泳池游泳的人。

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Mr.Obama ordered an additional 21,000 forces into Afghanistan in March, boosting the U.S.total to 68,000.

VOA: standard.2009.10.01

Toyota is accepting nonprofit nominations on the official Toyota Facebook page through March 21, 2011.

FORBES: Toyota is giving away 100 cars in 100 days

North Korea was informed on Feb. 21 of the drills, which run through March 21.

WSJ: North Korea Declares War Truce 'Invalid'

Witt submitted an Offer of Settlement dated March 21, 2012, which the regulator accepted.

FORBES: Merrill Lynch Trainee Doctors Failed Scores And Tests FINRA's Patience