regex101: JavaScript Substitution Workspace

^start of line

Non-Capturing Group(?:(?:(?:(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))|(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))|(?:02\/(?:0[1-9]|1[0-9]|2[0-8]))))\/\d{4}|02\/29\/(?:(?:\d{2}(?:04|08|[2468][048]|[13579][26]))|(?:(?:[02468][048])|[13579][26])00))

1st Alternative(?:(?:(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))|(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))|(?:02\/(?:0[1-9]|1[0-9]|2[0-8]))))\/\d{4}

Non-Capturing Group(?:(?:(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))|(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))|(?:02\/(?:0[1-9]|1[0-9]|2[0-8]))))

Non-Capturing Group(?:(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))|(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))|(?:02\/(?:0[1-9]|1[0-9]|2[0-8])))

1st Alternative(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))

Non-Capturing Group(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))

Non-Capturing Group(?:0[13578]|1[02])

1st Alternative0[13578]

0the 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)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:0[1-9]|[1-2][0-9]|3[01])

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

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[01]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[01]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2nd Alternative(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))

Non-Capturing Group(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))

Non-Capturing Group(?:0[469]|11)

1st Alternative0[469]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[469]

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

2nd Alternative11

11the literal text 11

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:0[1-9]|[1-2][0-9]|30)

3rd Alternative(?:02\/(?:0[1-9]|1[0-9]|2[0-8]))

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

2nd Alternative02\/29\/(?:(?:\d{2}(?:04|08|[2468][048]|[13579][26]))|(?:(?:[02468][048])|[13579][26])00)

Non-Capturing Group(?:\s(?:0[1-9]|1[0-2])\:[0-5][0-9]\:[0-5][0-9]\s(?:AM|PM|am|pm))?

$end of line

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

Search reference

Regular Expression

^(?:(?:(?:(?:(?:0[13578]|1[02])\/(?:0[1-9]|[1-2][0-9]|3[01]))|(?:(?:0[469]|11)\/(?:0[1-9]|[1-2][0-9]|30))|(?:02\/(?:0[1-9]|1[0-9]|2[0-8]))))\/\d{4}|02\/29\/(?:(?:\d{2}(?:04|08|[2468][048]|[13579][26]))|(?:(?:[02468][048])|[13579][26])00))(?:\s(?:0[1-9]|1[0-2])\:[0-5][0-9]\:[0-5][0-9]\s(?:AM|PM|am|pm))?$

Test String
New

12/12/2012
12/12/2012 05:05:59 am
02/29/2012
02/29/2010
02/28/2010
12/31/2012 11:59:55 pm
02/29/2000
02/29/1900
02/29/1800
02/29/1700
02/29/1600
02/29/0800
02/29/0700
ght 12/31/2012 11:59:55 pm mt

Regular Expressions 101

Regular Expression

Test String
New

Substitution
Processing...

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...