Regular Expressions 101

Group 1([^1-9][1-9]|[1-2][0-9]|3[0-1])

1st Alternative[^1-9][1-9]

Negated Character Class[^1-9]

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

Character Class[1-9]

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

2nd Alternative[1-2][0-9]

Character Class[1-2]

1-2one character from 1 (49₁₀) to 2 (50₁₀)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative3[0-1]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-1]

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Character Class[\./-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[0-1]?

?matches at most one character from the set below:

0-1one character from 0 (48₁₀) to 1 (49₁₀)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Character Class[\./-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(19[0-9]{2}|20[0-9]{2}|[0-9]{2})

1st Alternative19[0-9]{2}

19the literal text 19

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative20[0-9]{2}

20the literal text 20

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

3rd Alternative[0-9]{2}

Character Class[0-9]{2}

{2}matches exactly 2 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

([^1-9][1-9]|[1-2][0-9]|3[0-1])[\./-][0-1]?[0-9][\./-](19[0-9]{2}|20[0-9]{2}|[0-9]{2})

New


99.11.2017
09.11.2016
 31.12.1998
abcdefg09.1.2015

Regular Expression

Extraction