regex101: Clean Date Finder

1st Alternative(Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)\s(\d\d?)(st|nd|rd|th)?,?\s(\d{4})

1st AlternativeJan(?:uary)?

Janthe literal text Jan (case sensitive)

Non-Capturing Group(?:uary)?

?repeats the group contents below at most once:

uarythe literal text uary (case sensitive)

2nd AlternativeFeb(?:ruary)?

Febthe literal text Feb (case sensitive)

Non-Capturing Group(?:ruary)?

?repeats the group contents below at most once:

ruarythe literal text ruary (case sensitive)

3rd AlternativeMar(?:ch)?

Marthe literal text Mar (case sensitive)

Non-Capturing Group(?:ch)?

?repeats the group contents below at most once:

chthe literal text ch (case sensitive)

4th AlternativeApr(?:il)?

Aprthe literal text Apr (case sensitive)

Non-Capturing Group(?:il)?

?repeats the group contents below at most once:

ilthe literal text il (case sensitive)

5th AlternativeMay

Maythe literal text May (case sensitive)

6th AlternativeJune?

Junthe literal text Jun (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

7th AlternativeJuly?

Julthe literal text Jul (case sensitive)

y?optionally matches the literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

8th AlternativeAug(?:ust)?

Augthe literal text Aug (case sensitive)

Non-Capturing Group(?:ust)?

?repeats the group contents below at most once:

ustthe literal text ust (case sensitive)

9th AlternativeSep(?:tember)?

Septhe literal text Sep (case sensitive)

Non-Capturing Group(?:tember)?

?repeats the group contents below at most once:

temberthe literal text tember (case sensitive)

10th AlternativeOct(?:ober)?

Octthe literal text Oct (case sensitive)

Non-Capturing Group(?:ober)?

?repeats the group contents below at most once:

oberthe literal text ober (case sensitive)

11th AlternativeNov(?:ember)?

Novthe literal text Nov (case sensitive)

Non-Capturing Group(?:ember)?

?repeats the group contents below at most once:

emberthe literal text ember (case sensitive)

12th AlternativeDec(?:ember)?

Decthe literal text Dec (case sensitive)

Non-Capturing Group(?:ember)?

?repeats the group contents below at most once:

emberthe literal text ember (case sensitive)

\sany whitespace character

Group 2(\d\d?)

\da digit

\d?optionally matches a digit

Group 3(st|nd|rd|th)?

?repeats the group contents below at most once:

1st Alternativest

2nd Alternativend

3rd Alternativerd

4th Alternativeth

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

\sany whitespace character

Group 4(\d{4})

2nd Alternative(\d\d?)[\.\/-](\d\d?)[\.\/-](\d{4})

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)\s(\d\d?)(st|nd|rd|th)?,?\s(\d{4})|(\d\d?)[\.\/-](\d\d?)[\.\/-](\d{4})

Unit Tests

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