regex101: DateTime YYYYMMDDhhmmss (with leap year)

Explanation

Pro

Group 1(^(((\d\d)(([02468][048])|([13579][26]))0229)|(((\d\d)(\d\d)))((((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))|((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30)))))(([01]\d|2[0-3])([0-5]\d)([0-5]\d))$)

^start of string

Group 2(((\d\d)(([02468][048])|([13579][26]))0229)|(((\d\d)(\d\d)))((((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))|((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30)))))

1st Alternative((\d\d)(([02468][048])|([13579][26]))0229)

Group 3((\d\d)(([02468][048])|([13579][26]))0229)

Group 4(\d\d)

\da digit

Group 5(([02468][048])|([13579][26]))

1st Alternative([02468][048])

Group 6([02468][048])

Character Class[02468]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

Character Class[048]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

2nd Alternative([13579][26])

Group 7([13579][26])

Character Class[13579]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

5the literal 5 (53₁₀ / 65₈ / 35₁₆)

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

9the literal 9 (57₁₀ / 71₈ / 39₁₆)

Character Class[26]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

0229the literal text 0229

2nd Alternative(((\d\d)(\d\d)))((((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))|((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30))))

Group 8(((\d\d)(\d\d)))

Group 9((\d\d)(\d\d))

Group 10(\d\d)

\da digit

Group 11(\d\d)

\da digit

Group 12((((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))|((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30))))

1st Alternative(((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))

Group 13(((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))

Group 14((0[1-9])|(1[0-2]))

1st Alternative(0[1-9])

Group 15(0[1-9])

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

2nd Alternative(1[0-2])

Group 17((0[1-9])|(1\d)|(2[0-8]))

2nd Alternative((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30)))

Group 31(([01]\d|2[0-3])([0-5]\d)([0-5]\d))

$end of string, or before its final line terminator

Quick Reference

25 tokens

Regular Expression

(^(((\d\d)(([02468][048])|([13579][26]))0229)|(((\d\d)(\d\d)))((((0[1-9])|(1[0-2]))((0[1-9])|(1\d)|(2[0-8])))|((((0[13578])|(1[02]))31)|(((0[1,3-9])|(1[0-2]))(29|30)))))(([01]\d|2[0-3])([0-5]\d)([0-5]\d))$)

New

19741206131415

Extraction

19741206131415