Regular Expressions 101

Explanation

Pro

Group year(?<year>\d{4})

\d{4}a digit, repeated exactly 4 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group month(?<month>0[1-9]|1[0-2])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

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

2nd Alternative1[0-2]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-2]

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group day(?<day>0[1-9]|1[0-9]|2[0-9]|3[0-1])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

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

2nd Alternative1[0-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]

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

3rd Alternative2[0-9]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-9]

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

4th Alternative3[0-1]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-1]

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

Tthe literal T (84₁₀ / 124₈ / 54₁₆) (case sensitive)

Group time(?<time>(?:[0-1][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](?:.\d{3})?)

Non-Capturing Group(?:[0-1][0-9]|2[0-3])

1st Alternative[0-1][0-9]

Character Class[0-1]

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

Character Class[0-9]

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

2nd Alternative2[0-3]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[0-3]

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Character Class[0-9]

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

Character Class[0-9]

Non-Capturing Group(?:.\d{3})?

Group timezone(?<timezone>Z|[\+\-](?:0[1-9]|1[0-2]):(?:00|15|30|45))

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

26 tokens

Regular Expression

(?<year>\d{4})-(?<month>0[1-9]|1[0-2])-(?<day>0[1-9]|1[0-9]|2[0-9]|3[0-1])T(?<time>(?:[0-1][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](?:.\d{3})?)(?<timezone>Z|[\+\-](?:0[1-9]|1[0-2]):(?:00|15|30|45))

New

2015-02-07T13:28:17.239+02:00
2015-02-07T13:28:17.239+02:00

2017-00-01T00:00:00Z

Substitution

2015-02-07T13:28:17.239+02:00
2015-02-07T13:28:17.239+02:00

2017-00-01T00:00:00Z