RegExLib.com - The first Regular Expression Library on the Web!

Title	Test Details Pattern Title
Expression	^[0-9]{4}-(((0[13578]|(10|12))-(0[1-9]|[1-2][0-9]|3[0-1]))|(02-(0[1-9]|[1-2][0-9]))|((0[469]|11)-(0[1-9]|[1-2][0-9]|30)))$
Description	Matches the date format "YYYY-mm-dd" and also validates month and number of days in a month. All leap year dates "YYYY-02-29" passes trough. Could easily be changed to another format.
Matches	2004-04-30 | 2004-02-29
Non-Matches	2004-04-31 | 2004-02-30
Author	Rating: Johan Södercrantz

Title	Test Details Pattern Title
Expression	^([2-9]\d{3}((0[1-9]|1[012])(0[1-9]|1\d|2[0-8])|(0[13456789]|1[012])(29|30)|(0[13578]|1[02])31)|(([2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00))0229)$
Description	yyyyMMdd with leap year validation, starting from year 2000 only. The length of the expression is minimized, but still validates all entries. If you want it with years like 1600 or separators, just ask :)
Matches	20000101 | 20051231 | 20040229
Non-Matches	19990101 | 20053112 | 20050229
Author	Rating: Dany Lauener

Title	Test Details Pattern Title
Expression	^((0?[1-9]|[12][1-9]|3[01])\.(0?[13578]|1[02])\.20[0-9]{2}|(0?[1-9]|[12][1-9]|30)\.(0?[13456789]|1[012])\.20[0-9]{2}|(0?[1-9]|1[1-9]|2[0-8])\.(0?[123456789]|1[012])\.20[0-9]{2}|(0?[1-9]|[12][1-9])\.(0?[123456789]|1[012])\.20(00|04|08|12|16|20|24|28|32|36|40|44|48|52|56|60|64|68|72|76|80|84|88|92|96))$
Description	Fully functional date validator in format dd.MM.yyyy Works only within range of years 2000-2099 ! It allows leading zeros but does not require them. The last year pattern (enumeration) is not very clever but I will improve it, if needed.
Matches	31.01.2002 | 29.2.2004 | 09.02.2005
Non-Matches	31.11.2002 | 29.2.2002 | 33.06.2000
Author	Rating: Dalibor Kalna

Title	Test Details Pattern Title
Expression	^([01]\d|2[0123])([0-5]\d){2}$
Description	HHmmss without any separators. Hours in 24h format.
Matches	235959 | 000000 | 012345
Non-Matches	240000 | 23:59:59 | 236060
Author	Rating: Dany Lauener

Title	Test Details Pattern Title
Expression	^(((0?[1-9]|1[012])/(0?[1-9]|1\d|2[0-8])|(0?[13456789]|1[012])/(29|30)|(0?[13578]|1[02])/31)/(19|[2-9]\d)\d{2}|0?2/29/((19|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00)))$
Description	MM/dd/yyyy with 100% leap years. Valid since year 1900. MM and DD could have 1 or 2 digits : M/d/yyyy or MM/d/yyyy or M/dd/yyyy This was a request from a user in http://www.regexlib.com/REDetails.aspx?regexp_id=1038
Matches	01/31/1905 | 1/9/1900 | 2/29/1904
Non-Matches	31/01/2005 | 02/29/2005 | 2/29/2005
Author	Rating: Dany Lauener

Title	Test Details Pattern Title
Expression	((^(10|12|0?[13578])(3[01]|[12][0-9]|0?[1-9])((1[8-9]\d{2})|([2-9]\d{3}))$)|(^(11|0?[469])(30|[12][0-9]|0?[1-9])((1[8-9]\d{2})|([2-9]\d{3}))$)|(^(0?2)(2[0-8]|1[0-9]|0?[1-9])((1[8-9]\d{2})|([2-9]\d{3}))$)|(^(0?2)(29)([2468][048]00)$)|(^(0?2)(29)([3579][26]00)$)|(^(0?2)(29)([1][89][0][48])$)|(^(0?2)(29)([2-9][0-9][0][48])$)|(^(0?2)(29)([1][89][2468][048])$)|(^(0?2)(29)([2-9][0-9][2468][048])$)|(^(0?2)(29)([1][89][13579][26])$)|(^(0?2)(29)([2-9][0-9][13579][26])$))
Description	Matches on MMDDYYYY only, requires all 8 digits
Matches	01012003 | 02292000
Non-Matches	01/01/2003
Author	Rating: mike harber

Title	Test Details Pattern Title
Expression	^(([1-9]|[0-2]\d|[3][0-1])\.([1-9]|[0]\d|[1][0-2])\.[2][0]\d{2})$|^(([1-9]|[0-2]\d|[3][0-1])\.([1-9]|[0]\d|[1][0-2])\.[2][0]\d{2}\s([1-9]|[0-1]\d|[2][0-3])\:[0-5]\d)$
Description	Correct German DateTime. Does not check leap year rules! Possible Formats of date part: D.M.YYYY or D.MM.YYYY or DD.MM.YYYY or DD.M.YYYY Possible formats of time part: h:mm or hh:mm
Matches	20.10.2003 08:10 | 24.12.2003 | 1.1.2004 8:15
Non-Matches	25.13.2004 | 20.10.2003 08:9
Author	Rating: Markus Unterauer

Title	Test Details Months
Expression	^(?:J(anuary|u(ne|ly))|February|Ma(rch|y)|A(pril|ugust)|(((Sept|Nov|Dec)em)|Octo)ber)$
Description	This RE validate the full name of the months.
Matches	January | May | October
Non-Matches	Jan | Septem | Octo
Author	Rating: Michael Ash

Title	Test Details Pattern Title
Expression	(((0[123456789]|10|11|12)([/])(([1][9][0-9][0-9])|([2][0-9][0-9][0-9]))))
Description	This is an new data Validation to MM/YYYY from 1900 to 2999 this is an validation expression to Client From MOnth/Year.
Matches	01/1900 | 10/1990 | 12/2999
Non-Matches	1/1900 | 12/1899 | 01/3000
Author	Rating: Felipe Albacete

Title	Test Details Pattern Title
Expression	^(((((0[1-9])|(1\d)|(2[0-8]))-((0[1-9])|(1[0-2])))|((31-((0[13578])|(1[02])))|((29|30)-((0[1,3-9])|(1[0-2])))))-((20[0-9][0-9]))|(29-02-20(([02468][048])|([13579][26]))))$
Description	This expression validates a date field in the European DD-MM-YYYY format. Days are validate for the given month and year.
Matches	05-01-2002 | 29-02-2004 | 31-12-2002
Non-Matches	1-1-02 | 29-02-2002 | 31-11-2002
Author	Rating: Jörg Maag

Title	Test Details Pattern Title
Expression	^((0[1-9])|(1[0-2]))$
Description	Matches month, requires that months 1-9 have a leading 0
Matches	01 | 02 | 12
Non-Matches	1 | 2 | 13
Author	Rating: Tim Macrina

Title	Test Details Pattern Title
Expression	^([0]?[1-9]|[1][0-2])[./-]([0]?[1-9]|[1|2][0-9]|[3][0|1])[./-]([0-9]{4}|[0-9]{2})$
Description	Validate american date formats: mm/dd/yyyy or m/d/yy or m.d.yyyy with separators: . - / Valid dates only! m (1-12)/ d (1-31)/ y (0..) (rizzipereira.com.br) For Brazilian date format: http://www.regexlib.com/REDetails.aspx?regexp_id=250
Matches	10.03.1979 | 12/30/2004 | 01/01/2004
Non-Matches	09--02--2004 | 15-15-2004 | 13/12/2004
Author	Rating: Diego dos Santos

Title	Test Details Pattern Title
Expression	((\d{2})|(\d))\/((\d{2})|(\d))\/((\d{4})|(\d{2}))
Description	This matches simple dates against 1 or 2 digits for the month, 1 or 2 digit for the day, and either 2 or 4 digits for the year
Matches	4/5/91 | 04/5/1991 | 4/05/89
Non-Matches	4/5/1
Author	Rating: Andrew Lader

Title	Test Details Pattern Title
Expression	^([1-9]|1[0-2]|0[1-9]){1}(:[0-5][0-9][aApP][mM]){1}$
Description	Very simple expression to validate time on a 12 hour clock, this expression is valid for client-side script validations (RegularExpressionValidator - ASP.NET).
Matches	08:00AM | 10:00am | 7:00pm
Non-Matches	13:00pm | 12:65am
Author	Rating: Roberto Hernández

Title	Test Details Pattern Title
Expression	^(((((((0?[13578])|(1[02]))[\.\-/]?((0?[1-9])|([12]\d)|(3[01])))|(((0?[469])|(11))[\.\-/]?((0?[1-9])|([12]\d)|(30)))|((0?2)[\.\-/]?((0?[1-9])|(1\d)|(2[0-8]))))[\.\-/]?(((19)|(20))?([\d][\d]))))|((0?2)[\.\-/]?(29)[\.\-/]?(((19)|(20))?(([02468][048])|([13579][26])))))$
Description	Simple American date format mm-dd-yyyy or mm-dd-yy, no time. Date range is 1900 --> 2099. Is enough for my purposes. Incorectly validates 02-29-1900. I created this to validate dates on a web form where the likely range will be 2000-->2020. Seperators can be '.','/' or '-' Anyone know the rules for operator precedence for regex syntax?
Matches	02-29-2004 | 1/31/1997 | 1-2-03
Non-Matches	02-29-2003 | 04-31-2003 | 31-03-05
Author	Rating: Neil Walls

Title	Test Details M/d/y Date
Expression	^(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[13-9]|1[0-2])(\/|-|\.)(?:29|30)\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:0?2(\/|-|\.)29\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:(?:0?[1-9])|(?:1[0-2]))(\/|-|\.)(?:0?[1-9]|1\d|2[0-8])\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$
Description	This expression validates dates in the US m/d/y format from 1/1/1600 - 12/31/9999.
Matches	01.1.02 | 11-30-2001 | 2/29/2000
Non-Matches	02/29/01 | 13/01/2002 | 11/00/02
Author	Rating: Michael Ash

Title	Test Details Pattern Title
Expression	^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$
Description	dd/MM/yyyy with leap years 100% integrated Valid years : from 1900 to 9999. As usual, many tests have been made. This was requested by a user : http://www.regexlib.com/REDetails.aspx?regexp_id=409
Matches	29/02/2000 | 30/04/2003 | 01/01/2003
Non-Matches	29/02/2001 | 30-04-2003 | 1/1/1899
Author	Rating: Dany Lauener

Title	Test Details Pattern Title
Expression	^(?=\d)(?:(?!(?:1582(?:\.|-|\/)10(?:\.|-|\/)(?:0?[5-9]|1[0-4]))|(?:1752(?:\.|-|\/)0?9(?:\.|-|\/)(?:0?[3-9]|1[0-3])))(?=(?:(?!000[04]|(?:(?:1[^0-6]|[2468][^048]|[3579][^26])00))(?:(?:\d\d)(?:[02468][048]|[13579][26]))\D0?2\D29)|(?:\d{4}\D(?!(?:0?[2469]|11)\D31)(?!0?2(?:\.|-|\/)(?:29|30))))(\d{4})([-\/.])(0?\d|1[012])\2((?!00)[012]?\d|3[01])(?:$|(?=\x20\d)\x20))?((?:(?:0?[1-9]|1[012])(?::[0-5]\d){0,2}(?:\x20[aApP][mM]))|(?:[01]\d|2[0-3])(?::[0-5]\d){1,2})?$
Description	yyyy/mm/dd hh:MM:ss Datetime for all AD years, including leap years. Javascript safe version of http://regexlib.com/REDetails.aspx?regexp_id=760. Please see that regex for details of what is being checked
Matches	0008-02-29 | 2:34:59 PM | 9999/12/31 11:59 PM
Non-Matches	04/04/04 | 1:00 | 1999/1/32
Author	Rating: Michael Ash

Title	Test Details Pattern Title
Expression	^(((0?[1-9]|[12]\d|3[01])[\.\-\/](0?[13578]|1[02])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}|\d))|((0?[1-9]|[12]\d|30)[\.\-\/](0?[13456789]|1[012])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}|\d))|((0?[1-9]|1\d|2[0-8])[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}|\d))|(29[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00|[048])))$
Description	This regexp has been posted specialy for "Mike O Shea" as he requested a mono digit year validation. matches DD/MM/Y or DD/MM/YYYY or D/M/Y or DD/M/YYYY Leap years treated. (Italian style with tomato) Years 0-9 equal years 2000 to 2009 for leap years
Matches	1/1/2005 | 29/02/12 | 29/02/2400
Non-Matches	29/2/2005 | 29/02/13 | 29/02/2200
Author	Rating: Dany Lauener

Title	Test Details Pattern Title
Expression	^(((0?[1-9]|[12]\d|3[01])[\.\-\/](0?[13578]|1[02])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|[12]\d|30)[\.\-\/](0?[13456789]|1[012])[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|((0?[1-9]|1\d|2[0-8])[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?\d{2}))|(29[\.\-\/]0?2[\.\-\/]((1[6-9]|[2-9]\d)?(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00)|00)))$
Description	DD.MM.YY or DD.MM.YYYY separator could be on choice '.' '/' or '-' leap years compatible, 00 is treated as year 2000.
Matches	29.2.04 | 29/02-2004 | 3.4.05
Non-Matches	29.2.03 | 2902.2004 | 12.31.1975
Author	Rating: Dany Lauener