DatePattern

DatePattern[{"e1", "e2", ...}] represents the characters of a date with elements of type "ei" in StringExpression.

DatePattern[{"e1", "e2", ...}, sep] allows separators that match the string expression sep.

Examples

Match a date pattern in a string:

StringMatchQ["2020-01-15", DatePattern[{"Year", "-", "Month", "-", "Day"}]]
(* True *)

Please visit the official Wolfram Language Reference for more details.