regex101: dd-mm-YYYY HH:mm:ss (year range 1000-2999)

^start of line

Group day(?<day>0[1-9]|1\d|2[1-8]|29(?=-\d{2}-(?!1[26]00|2[048]00)\d{2}(?:[02468][048]|[13579][26]))|30(?!-02)|31(?=-0[13578]|-1[02]))

1st Alternative0[1-9]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

Character Class[1-9]

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

2nd Alternative1\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

\da digit

3rd Alternative2[1-8]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[1-8]

1-8one character from 1 (49₁₀) to 8 (56₁₀)

4th Alternative29(?=-\d{2}-(?!1[26]00|2[048]00)\d{2}(?:[02468][048]|[13579][26]))

29the literal text 29

Positive Lookahead(?=-\d{2}-(?!1[26]00|2[048]00)\d{2}(?:[02468][048]|[13579][26]))

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Negative Lookahead(?!1[26]00|2[048]00)

1st Alternative1[26]00

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[26]

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

6the literal 6 (54₁₀ / 66₈ / 36₁₆)

00the literal text 00

2nd Alternative2[048]00

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

Character Class[048]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

00the literal text 00

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

Non-Capturing Group(?:[02468][048]|[13579][26])

1st Alternative[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]

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)

5th Alternative30(?!-02)

30the literal text 30

Negative Lookahead(?!-02)

-02the literal text -02

6th Alternative31(?=-0[13578]|-1[02])

31the literal text 31

Positive Lookahead(?=-0[13578]|-1[02])

1st Alternative-0[13578]

-0the literal text -0

Character Class[13578]

2nd Alternative-1[02]

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group month(?<month>0[1-9]|1[0-2])

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group year(?<year>[12]\d{3})

the literal (32₁₀ / 40₈ / 20₁₆)

Group hour(?<hour>[01]\d|2[0-3])

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group minute(?<minute>[0-5]\d)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group second(?<second>[0-5]\d)

$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

^(?<day>0[1-9]|1\d|2[1-8]|29(?=-\d{2}-(?!1[26]00|2[048]00)\d{2}(?:[02468][048]|[13579][26]))|30(?!-02)|31(?=-0[13578]|-1[02]))-(?<month>0[1-9]|1[0-2])-(?<year>[12]\d{3}) (?<hour>[01]\d|2[0-3]):(?<minute>[0-5]\d):(?<second>[0-5]\d)$

Unit Tests

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