represents the characters of a date with elements of type "ei" in StringExpression.


allows separators that match the string expression sep.


  • Possible element types "ei" are: "Year", "Quarter", "Month", "MonthName", "Day", "DayName", "Hour", "AMPM", "Minute", "Second".
  • If no explicit separator is specified, the "ei" must be separated by /, -, :, or . characters.


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Basic Examples  (3)

Compare a string to a list of date elements:

Compare to a list of time elements:

Compare to a pattern with all separators explicitly given:

Scope  (2)

Date elements do not match out-of-range values:

Test a string allowing only "/" characters as separators:

Test the same string allowing only colon separators:

Applications  (1)

Define a function only for month, year strings:

The function returns unevaluated for other input patterns:

Properties & Relations  (1)

DateString gives results that match a date pattern:

Introduced in 2007