regex101: Regular Expression For Date

Pro

^start of string

Non-Capturing Group(?:^(?:(?:(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))[- /.](?:1[6-9]|[2-9]\d)\d{2})|(?:0?2[- /.]29[- /.](?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))[- /.](?:0?[1-9]|1\d|2[0-8])[- /.](?:(?:1[6-9]|[2-9]\d)\d{2}))$)

^start of string

Non-Capturing Group(?:(?:(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))[- /.](?:1[6-9]|[2-9]\d)\d{2})|(?:0?2[- /.]29[- /.](?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))[- /.](?:0?[1-9]|1\d|2[0-8])[- /.](?:(?:1[6-9]|[2-9]\d)\d{2}))

1st Alternative(?:(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))[- /.](?:1[6-9]|[2-9]\d)\d{2})

Non-Capturing Group(?:(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))[- /.](?:1[6-9]|[2-9]\d)\d{2})

Non-Capturing Group(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))

1st Alternative(?:(?:0?[13578]|1[02])[- /.]31)

Non-Capturing Group(?:(?:0?[13578]|1[02])[- /.]31)

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

1st Alternative0?[13578]

0?optionally matches the 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)

Character Class[- /.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

31the literal text 31

2nd Alternative(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30))

Non-Capturing Group(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30))

Non-Capturing Group(?:0?[13-9]|1[0-2])

1st Alternative0?[13-9]

0?optionally matches the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[13-9]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

3-9one character from 3 (51₁₀) 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)

Character Class[- /.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:29|30)

1st Alternative29

29the literal text 29

2nd Alternative30

30the literal text 30

Character Class[- /.]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:1[6-9]|[2-9]\d)

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

2nd Alternative(?:0?2[- /.]29[- /.](?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))

3rd Alternative(?:(?:0?[1-9])|(?:1[0-2]))[- /.](?:0?[1-9]|1\d|2[0-8])[- /.](?:(?:1[6-9]|[2-9]\d)\d{2})

$end of string

26 tokens

Regular Expression

^(?:^(?:(?:(?:(?:(?:0?[13578]|1[02])[- /.]31)|(?:(?:0?[13-9]|1[0-2])[- /.](?:29|30)))[- /.](?:1[6-9]|[2-9]\d)\d{2})|(?:0?2[- /.]29[- /.](?:(?:(?:1[6-9]|[2-9]\d)(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))|(?:(?:0?[1-9])|(?:1[0-2]))[- /.](?:0?[1-9]|1\d|2[0-8])[- /.](?:(?:1[6-9]|[2-9]\d)\d{2}))$)$

New

11-30-201

Substitution

11-30-201