Regular Expressions 101

Explanation

Pro

Group MM(?<MM>[01]?[0-9])

Character Class[01]?

?matches at most one character from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group DD(?<DD>[0-3]?[0-9])

Character Class[0-3]?

?matches at most one character from the set below:

0-3one character from 0 (48₁₀) to 3 (51₁₀)

Character Class[0-9]

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group YYYY(?<YYYY>[0-2][0-9][0-9][0-9])

Character Class[0-2]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

Character Class[0-9]

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

Character Class[0-9]

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

Character Class[0-9]

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.

25 tokens

(?<MM>[01]?[0-9])\/(?<DD>[0-3]?[0-9])\/(?<YYYY>[0-2][0-9][0-9][0-9])

New

mm/dd/yyyy Examples

01/01/2020 #1st Jan
07/03/2020 #3 July
12/2/2020 #2 December 
4/23/2020 #23 April 
19/39/2020

mm/dd/yyyy Examples

01/01/2020 #1st Jan
07/03/2020 #3 July
12/2/2020 #2 December 
4/23/2020 #23 April 
19/39/2020