regex101: date time validation

Pro

^start of line

Group 1(((\d\d)(([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])|([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])|([0][2])([0][1-9]|[1][0-9]|[2][0-8])))|([02468][048]|[13579][26])([0][2])([0][1-9]|[1-2][0-9]))

1st Alternative((\d\d)(([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])|([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])|([0][2])([0][1-9]|[1][0-9]|[2][0-8])))

Group 2((\d\d)(([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])|([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])|([0][2])([0][1-9]|[1][0-9]|[2][0-8])))

Group 3(\d\d)

\da Unicode decimal digit

Group 4(([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])|([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])|([0][2])([0][1-9]|[1][0-9]|[2][0-8]))

1st Alternative([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])

Group 5([0][13578]|[1][0]|[1][2])

1st Alternative[0][13578]

Character Class[0]

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 Alternative[1][0]

Character Class[1]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

3rd Alternative[1][2]

Character Class[1]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[2]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Group 6([0][1-9]|[1-2][0-9]|[3][0-1])

1st Alternative[0][1-9]

Character Class[0]

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 Alternative[3][0-1]

Character Class[3]

3the literal 3 (51₁₀ / 63₈ / 33₁₆)

Character Class[0-1]

2nd Alternative([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])

3rd Alternative([0][2])([0][1-9]|[1][0-9]|[2][0-8])

2nd Alternative([02468][048]|[13579][26])([0][2])([0][1-9]|[1-2][0-9])

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 14([0-1][0-9]|[2][0-3])

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 15([0-5][0-9])

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

Group 16([0-5][0-9])

$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

25 tokens

Regular Expression

^(((\d\d)(([0][13578]|[1][0]|[1][2])([0][1-9]|[1-2][0-9]|[3][0-1])|([0][469]|[1][1])([0][1-9]|[1-2][0-9]|[3][0])|([0][2])([0][1-9]|[1][0-9]|[2][0-8])))|([02468][048]|[13579][26])([0][2])([0][1-9]|[1-2][0-9]))-([0-1][0-9]|[2][0-3])_([0-5][0-9])_([0-5][0-9])$

Unit Tests

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