Regular Expression For Cron Time Expressions
A regex that matches valid cron time expressions with or without predefined scheduling macros and @every durations.
/(((\d+,)+\d+|(\d+(\/|-)\d+)|\d+|\*) ?){5,7}/
Regular Expressions For Date & Time
Regex To Match A Valid Day In A Date String
A regular expression to match a valid day in a date string (from 1 to 31).
/(0[1-9]|[12]\d|3[01])/g
Regular Expression To Match Names Of The Days Of The Week
A regular expression that matches the various names of the days of the week.
/\b(?:Tue(?:sday)?|Wed(?:nesday)?|Thu(?:rsday)?|Sat(?:urday)?|(Mon|Fri|Sun)(?:day)?)/gi
Regular Expression To Match Month Name
A regular expression that matches month names. Supports both full month names and 3-letter abbreviations.
/\b(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|Jun(?:e)?|Jul(?:y)?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|(Nov|Dec)(?:ember)?)/g
All-in-one Date Validation Regular Expression
An All-in-one regular expression to valid dates in mm/dd/yyyy, mm-dd-yyyy, or mm.dd.yyyy format.
/^(?:(?:(?:0?[13578]|1[02])(\/|-|\.)31)\1|(?:(?:0?[1,3-9]|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})$/
Regular Expression For Year
A regular expression to match and validate a 4-digit year (from 1900 to 2099).
/^(19|20)[\d]{2,2}$/
Regular Expression To Match A Time (mm:ss) Limited To 60 Minutes
A regular expression to match a time (mm:ss) limited to 60 minutes.
/^(([0]?[0-5][0-9]|[0-9]):([0-5][0-9]))$/
RFC 2822 Date Format Regular Expression
A regular expression to match RFC 2822 timestamps.
/^(?:(Sun|Mon|Tue|Wed|Thu|Fri|Sat),\s+)?(0[1-9]|[1-2]?[0-9]|3[01])\s+(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+(19[0-9]{2}|[2-9][0-9]{3})\s+(2[0-3]|[0-1][0-9]):([0-5][0-9])(?::(60|[0-5][0-9]))?\s+([-\+][0-9]{2}[0-5][0-9]|(?:UT|GMT|(?:E|C|M|P)(?:ST|DT)|[A-IK-Z]))(\s+|\(([^\(\)]+|\\\(|\\\))*\))*$/
Regex To Match ISO 8601 Dates and Times
A set of regular expressions to match ISO 8601 years, weeks, dates, times, and datetimes with optional time zone.
/^(-?(?:[1-9][0-9]*)?[0-9]{4})-(1[0-2]|0[1-9])-(3[01]|0[1-9]|[12][0-9])(Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$/
Regular Expression To Match 12-hour Time With AM/PM
A regular expression to match a 12-hour time with AM/PM after it.
/^ *(1[0-2]|[1-9]):[0-5][0-9] *(a|p|A|P)(m|M) *$/