Regular Expressions 101

Regex following "ISO 8601" without hour : allowing only month 1 to 12, the day of 1 to 31 for the months of 31 days, the months from 1 to 30 for the months of 30 days, the day of 1 to 28 for February, and the day from 1 to 29 for February of leap years

The RegExp validates ISO8601 date and time (without milliseconds) with timezone offset.

Any date that as a valid month, a valid date and a year composed of 4 numbers. You can change the '-' caracter to any divider you want.

Any date that as a valid month, a valid date and a year composed of 4 numbers. You can change the '-' caracter to any divider you want.

PubMEd XML contains multiple date blocks, with or without Month, day, hour, minute. USAGE: while(my($pubstatus,$year,$month,$day,$hour,$minute)= $article =~ m% (?:\s* (?:\s(\d?)\s)* (?:\s(\d?)(?:)?\s)...

Test for all ISO 8601 date formats and only accept valid dates, e.g. 2016-02-29, but not 2016-02-30 or 2017-02-29.

12.04.1975T03:02:00.88 With milliseconds and T seperator. Excludes most invalid dates, except 30/31ths of month, leap years/february heaving only 29/28.

yyyy-mm-dd

ISO8601 Date Interval with support for fractional values and repeating intervals. DOES NOT SUPPORT fixed intervals (e.g. 2016-03-22P3D or 2016-03-22T14:00Z--2016-03-2518:00+02:00). See https://regex101.com/r/iN2zO9/1 for a ISO8601 date time regex.

Matches an ISO8601 date time string, including fractional time. Does not exclude non-existent times (such as the 29th february in non-leap-years)

Valid Date format:

valida fechas de 19## a 20##, en formato yyyy-MM-dd