regex101: PCRE (Legacy) Match Workspace

Pro

\ban ASCII word boundary

Group 1((?|(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*(?: (\d{2}(?:th|st|nd|rd)?)?[,.])?|(\d{2}) (?:(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*)?) (\d{4}))

Branch Reset Group(?|(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*(?: (\d{2}(?:th|st|nd|rd)?)?[,.])?|(\d{2}) (?:(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*)?)

1st Alternative(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*(?: (\d{2}(?:th|st|nd|rd)?)?[,.])?

Group 2(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)

1st AlternativeJan

Janthe literal text Jan (case sensitive)

2nd AlternativeFeb

Febthe literal text Feb (case sensitive)

3rd AlternativeMar

Marthe literal text Mar (case sensitive)

4th AlternativeApr

Aprthe literal text Apr (case sensitive)

5th AlternativeMay

Maythe literal text May (case sensitive)

6th AlternativeJun

Junthe literal text Jun (case sensitive)

7th AlternativeJul

Julthe literal text Jul (case sensitive)

8th AlternativeAug

Augthe literal text Aug (case sensitive)

9th AlternativeSep

Septhe literal text Sep (case sensitive)

10th AlternativeOct

Octthe literal text Oct (case sensitive)

11th AlternativeNov

Novthe literal text Nov (case sensitive)

12th AlternativeDec

Decthe literal text Dec (case sensitive)

Character Class[a-z,.]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?: (\d{2}(?:th|st|nd|rd)?)?[,.])?

?repeats the group contents below at most once:

the literal (32₁₀ / 40₈ / 20₁₆)

Group 3(\d{2}(?:th|st|nd|rd)?)?

?repeats the group contents below at most once:

\d{2}a digit, repeated exactly 2 times

Non-Capturing Group(?:th|st|nd|rd)?

?repeats the group contents below at most once:

1st Alternativeth

ththe literal text th (case sensitive)

2nd Alternativest

stthe literal text st (case sensitive)

3rd Alternativend

ndthe literal text nd (case sensitive)

4th Alternativerd

rdthe literal text rd (case sensitive)

Character Class[,.]

,the literal , (44₁₀ / 54₈ / 2C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

2nd Alternative(\d{2}) (?:(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*)?

the literal (32₁₀ / 40₈ / 20₁₆)

Group 4(\d{4})

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

25 tokens

Regular Expression

\b((?|(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*(?: (\d{2}(?:th|st|nd|rd)?)?[,.])?|(\d{2}) (?:(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z,.]*)?) (\d{4}))

New

text Mar 20, 2009 text
text March 20, 2009 text
text 20 Mar. 2009 text
text Sep 2010 text
text Mar 20th, 2009 text 
text Mar 21st, 2009 text