Regular Expressions 101

Explanation
Pro

Group fmonth(?P<fmonth>[^\W\d_]+(?:\W+\d+)?)

Negated Character Class[^\W\d_]+

+matches at least one character outside the set below:

\Wany character that is not a Unicode word character

\da Unicode decimal digit

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Non-Capturing Group(?:\W+\d+)?

?repeats the group contents below at most once:

\W+any character that is not a Unicode word character, repeated at least once

\d+a Unicode decimal digit, repeated at least once

\s+a Unicode whitespace character, repeated at least once

Non-Capturing Group(?:to|a|-)

1st Alternativeto

tothe literal text to (case sensitive)

2nd Alternativea

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

3rd Alternative-

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\s+a Unicode whitespace character, repeated at least once

Group smonth(?P<smonth>[^\W\d_]+\W+\d+)

Negated Character Class[^\W\d_]+

+matches at least one character outside the set below:

\Wany character that is not a Unicode word character

\da Unicode decimal digit

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\W+any character that is not a Unicode word character, repeated at least once

\d+a Unicode decimal digit, repeated at least once

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?P<fmonth>[^\W\d_]+(?:\W+\d+)?)\s+(?:to|a|-)\s+(?P<smonth>[^\W\d_]+\W+\d+)

New

From August 2017 - September 2018
From August to September 2018
July 2009 - August 2019
De Aout 2019 a July 2020
De Juillet a Aout 2020
Juillet - Aout 2019
Juillet a Aout 2019
07/2019 - 08/2019

Extraction

From August 2017 - September 2018
From August to September 2018
July 2009 - August 2019
De Aout 2019 a July 2020
De Juillet a Aout 2020
Juillet - Aout 2019
Juillet a Aout 2019
07/2019 - 08/2019