regex101: PCRE (Legacy) Match Workspace

Pro

Non-Capturing Group(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May?|June?|July?|Aug(?:ust)?|Sep(?:t(?:ember)?)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?\s+\d{2},\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?

Mathe literal text Ma (case sensitive)

y?optionally matches the literal y (121₁₀ / 171₈ / 79₁₆) (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(?:t(?:ember)?)?

Septhe literal text Sep (case sensitive)

Non-Capturing Group(?:t(?:ember)?)?

?repeats the group contents below at most once:

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

Non-Capturing Group(?:ember)?

?repeats the group contents below at most once:

emberthe literal text ember (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)?\s+\d{2},\s+\d{4}

Decthe literal text Dec (case sensitive)

Non-Capturing Group(?:ember)?

?repeats the group contents below at most once:

emberthe literal text ember (case sensitive)

\s+any whitespace character, repeated at least once

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

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s+any whitespace character, repeated at least once

\d{4}a digit, repeated exactly 4 times

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

25 tokens

Regular Expression

(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May?|June?|July?|Aug(?:ust)?|Sep(?:t(?:ember)?)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?\s+\d{2},\s+\d{4})

New

the date is December 15, 2009
Nov 15,1909
Jan 15,1809
January 15,2009
Dec 22, 2014