regex101: Python Match Workspace

Negative Lookbehind(?<!d)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

Non-Capturing Group(?: (?:(?:0?[1-9]|[12]\d)|3[01])\s?[./:-][\s.]?(?:0?[13578]|1[02]|J(?:an(?:uar)?|uli?)|M(?:ärz?|ai)|Aug(?:ust)?|Dez(?:ember)?|Okt(?:ober)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d| (?:(?:0?[1-9]|[12]\d)|30)\s?[./:-][\s.]?(?:0?[13-9]|1[012]|J(?:an(?:uar)?|u[nl]i?)|M(?:ärz?|ai)|A(?:pr(?:il)?|ug(?:ust)?)|Sep(?:tember)?|(?:Nov|Dez)(?:ember)?|Okt(?:ober)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d| (?:0?[1-9]|[12]\d)\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d(?:[02468][048]|[13579][26])| (?:0?[1-9]|[12][0-8])\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d )

1st Alternative (?:(?:0?[1-9]|[12]\d)|3[01])\s?[./:-][\s.]?(?:0?[13578]|1[02]|J(?:an(?:uar)?|uli?)|M(?:ärz?|ai)|Aug(?:ust)?|Dez(?:ember)?|Okt(?:ober)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d

Non-Capturing Group(?:(?:0?[1-9]|[12]\d)|3[01])

1st Alternative(?:0?[1-9]|[12]\d)

Non-Capturing Group(?:0?[1-9]|[12]\d)

1st Alternative0?[1-9]

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative[12]\d

Character Class[12]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\da Unicode decimal digit

2nd Alternative3[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\s?optionally matches a Unicode whitespace character

Character Class[./:-]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[\s.]?

?matches at most one character from the set below:

\sa Unicode whitespace character

.the literal . (46₁₀ / 56₈ / 2E₁₆)

1st Alternative0?[13578]

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[13578]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

2nd Alternative1[02]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[02]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

3rd AlternativeJ(?:an(?:uar)?|uli?)

Jthe literal J (74₁₀ / 112₈ / 4A₁₆) (case sensitive)

Non-Capturing Group(?:an(?:uar)?|uli?)

1st Alternativean(?:uar)?

anthe literal text an (case sensitive)

Non-Capturing Group(?:uar)?

?repeats the group contents below at most once:

uarthe literal text uar (case sensitive)

2nd Alternativeuli?

ulthe literal text ul (case sensitive)

i?optionally matches the literal i (105₁₀ / 151₈ / 69₁₆) (case sensitive)

4th AlternativeM(?:ärz?|ai)

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

Non-Capturing Group(?:ärz?|ai)

5th AlternativeAug(?:ust)?

6th AlternativeDez(?:ember)?

7th AlternativeOkt(?:ober)?

\s?optionally matches a Unicode whitespace character

Non-Capturing Group(?:[./:-][\s.]?)?

Character Class[1-9]

\da Unicode decimal digit

3rd Alternative (?:0?[1-9]|[12]\d)\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d(?:[02468][048]|[13579][26])

4th Alternative (?:0?[1-9]|[12][0-8])\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d

Negative Lookahead(?!\d)

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Search reference

Regular Expression

(?<!d)(?:
  (?:(?:0?[1-9]|[12]\d)|3[01])\s?[./:-][\s.]?(?:0?[13578]|1[02]|J(?:an(?:uar)?|uli?)|M(?:ärz?|ai)|Aug(?:ust)?|Dez(?:ember)?|Okt(?:ober)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d|
  (?:(?:0?[1-9]|[12]\d)|30)\s?[./:-][\s.]?(?:0?[13-9]|1[012]|J(?:an(?:uar)?|u[nl]i?)|M(?:ärz?|ai)|A(?:pr(?:il)?|ug(?:ust)?)|Sep(?:tember)?|(?:Nov|Dez)(?:ember)?|Okt(?:ober)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d|
  (?:0?[1-9]|[12]\d)\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d(?:[02468][048]|[13579][26])|
  (?:0?[1-9]|[12][0-8])\s?[./:-][\s.]?(?:0?2|Fe(?:b(?:ruar)?)?)\s?(?:[./:-][\s.]?)?[1-9]\d\d\d
)(?!\d)

New

12.12.2021
09. Juni 1997
01.Aug.1995
27.06. 1997
29.02.1996
21. 01. 1999
28.05. 1996
07..4..1995
20:03:1998
9.4.1997
14 .03 - 1995

Month regex is tested at https://regex101.com/r/tClRRs/2
(?:J(?:an(?:uar)?|u[nl]i?)|Fe(?:b(?:ruar)?)?|M(?:ärz?|ai)|A(?:pr(?:il)?|ug(?:ust)?)|Sep(?:tember)?|(?:Nov|Dez)(?:ember)?|Okt(?:ober)?)
Taking out Feb: (?:J(?:an(?:uar)?|u[nl]i?)|M(?:ärz?|ai)|A(?:pr(?:il)?|ug(?:ust)?)|Sep(?:tember)?|(?:Nov|Dez)(?:ember)?|Okt(?:ober)?)

Regular Expressions 101

Regular Expression

Extraction