regex101: .NET 10.0 (C#) Match Workspace

Pro

Negative Lookbehind(?<!(?:\w+ *[=|] *|{{\w+ *\| *)[\w ]*)

Non-Capturing Group(?:\w+ *[=|] *|{{\w+ *\| *)

1st Alternative\w+ *[=|] *

\w+a Unicode word character, repeated at least once

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Character Class[=|]

=the literal = (61₁₀ / 75₈ / 3D₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

2nd Alternative{{\w+ *\| *

{{the literal text {{

\w+a Unicode word character, repeated at least once

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Character Class[\w ]*

*matches any number of characters from the set below:

\wa Unicode word character

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:(\d+(?:er)?|\d+{{er}}|{{\d+er}}) *)?

?repeats the group contents below at most once:

Group 1(\d+(?:er)?|\d+{{er}}|{{\d+er}})

1st Alternative\d+(?:er)?

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

Non-Capturing Group(?:er)?

?repeats the group contents below at most once:

erthe literal text er (case insensitive)

2nd Alternative\d+{{er}}

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

{{er}}the literal text {{er}} (case insensitive)

3rd Alternative{{\d+er}}

{{the literal text {{

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

er}}the literal text er}} (case insensitive)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

1st Alternativejanvier

janvierthe literal text janvier (case insensitive)

2nd Alternativef[ée]vrier

fthe literal f (102₁₀ / 146₈ / 66₁₆) (case insensitive)

Character Class[ée]

éthe literal é (233₁₀ / 351₈ / E9₁₆) (case insensitive)

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case insensitive)

vrierthe literal text vrier (case insensitive)

3rd Alternativemars

marsthe literal text mars (case insensitive)

4th Alternativeavril

avrilthe literal text avril (case insensitive)

5th Alternativemai

maithe literal text mai (case insensitive)

6th Alternativejuin

juinthe literal text juin (case insensitive)

7th Alternativejuillet

juilletthe literal text juillet (case insensitive)

8th Alternativea[ôo][ûu]t

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

Character Class[ôo]

ôthe literal ô (244₁₀ / 364₈ / F4₁₆) (case insensitive)

othe literal o (111₁₀ / 157₈ / 6F₁₆) (case insensitive)

Character Class[ûu]

ûthe literal û (251₁₀ / 373₈ / FB₁₆) (case insensitive)

uthe literal u (117₁₀ / 165₈ / 75₁₆) (case insensitive)

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

9th Alternativeseptembre

septembrethe literal text septembre (case insensitive)

10th Alternativeoctobre

11th Alternativenovembre

12th Alternatived[ée]cembre

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

Group 3(\d{3,4})

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

25 tokens

Regular Expression

(?<!(?:\w+ *[=|] *|{{\w+ *\| *)[\w ]*)(?:(\d+(?:er)?|\d+{{er}}|{{\d+er}}) *)?(janvier|f[ée]vrier|mars|avril|mai|juin|juillet|a[ôo][ûu]t|septembre|octobre|novembre|d[ée]cembre) *(\d{3,4})

New

 1er mars 2020
 {{1er}} mars 2020
 1{{er}} mars 2020
 1 mars 2020
 20 mars 2020


I don't want these ones:
date= 20 Mars 2025
date=20 Mars 2025
{{date|20 aout 2020}}
{{date| 20 aout 2020}}

{{date|20 aout 2020}}  1{{er}} mars 2020 {{date|20 aout 2020}}  1{{er}} mars 2020  1{{er}} mars 2020  1 mars 2020  20 mars 2020 date=20 Mars 2025
 

12 octobre 2012
foo=12 octobre 2012
foo = 12 octobre 2012
bar|12 octobre 2012
bar | 12 octobre 2012