Date, year, month, and day Regular Expressions

This can only be used in Java and cannot be used in JavaScript. JavaScript does not support reverse pre-search. Yyyy-MM-dd, yyy-MM-dd, yy-MM-dd, and y-MM-dd are supported, that is, the year is 1 ~ Four digits in the range of (1 ~ 9999, not 0 a.m.), the month and the day should be two digits (if the month and the day are to be a digit, You need to modify it a little ), the separator is "-" (comments are added to all separators and can be changed to other characters ).

(? : [0-9] {1, 4 }(? <! ^ 0? 0? 0? 0 ))-(? : 0 [1-9] | 1 [0-2])-(? : 0 [1-9] | 1 [0-9] | 2 [0-8] | (? :(? <= (? : 0 [1, 13578] | 1 [02])-) (? : 29 | 3 [01]) | (? :(? <= (? : 0 [469] | 11 )-)(? : 29 | 30) | (? :(? <= (? :(? : [0-9] {0, 2 }(?! 0? 0 )(? : [02468]? (? <! [13579]) [048] | [13579] [26]) | (? :(? : [02468]? [048] | [13579] [26]) 00)-02 -)(? : 29 )))