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DateQ
date given in long form 
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更多信息
- To use
, you first need to load the Calendar Package using Needs["Calendar`"]. - The following options can be given:
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Calendar Automatic specify which calendar system to use - The default calendar is the usual Western (American) calendar, but can be changed with the Calendar option.
- Valid settings for Calendar are Automatic, Julian, Gregorian, Islamic, and Jewish.
范例打开所有单元
基本范例 (5)
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recognizes ordinary Western dates:
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will identify leap years. The year 2000 was a leap year:
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The year 1900 was not a leap year:
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By default, Mathematica uses the standard Western (British/American) calendar. The British/American calendar applies the Julian calendar to dates before 1752 and the Gregorian calendar after:
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The default British/American calendar deletes the dates September 3 to 13, 1752:
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