Regular Expressions 101

\ban ASCII word boundary

Group 1([1-9]|[12][0-9]|3[01])

1st Alternative[1-9]

Character Class[1-9]

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

2nd Alternative[12][0-9]

Character Class[12]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

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)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 2(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)

1st AlternativeJan

Janthe literal text Jan (case sensitive)

2nd AlternativeFeb

Febthe literal text Feb (case sensitive)

3rd AlternativeMar

Marthe literal text Mar (case sensitive)

4th AlternativeApr

Aprthe literal text Apr (case sensitive)

5th AlternativeMay

Maythe literal text May (case sensitive)

6th AlternativeJun

Junthe literal text Jun (case sensitive)

7th AlternativeJul

Julthe literal text Jul (case sensitive)

8th AlternativeAug

Augthe literal text Aug (case sensitive)

9th AlternativeSep

Septhe literal text Sep (case sensitive)

10th AlternativeOct

Octthe literal text Oct (case sensitive)

11th AlternativeNov

Novthe literal text Nov (case sensitive)

12th AlternativeDec

Decthe literal text Dec (case sensitive)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(\d{2})

\d{2}a digit, repeated exactly 2 times

\ban ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\b([1-9]|[12][0-9]|3[01])-(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)-(\d{2})\b

Test String
New

3-Jul-16
30-Jun-16

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
Processing...