\d{2}a digit, repeated exactly 2 times
de the literal text de (case sensitive) Group 1((Jan|Fever)eiro|(Març|Mai)o|Abril|Ju[ln]ho|Agosto|(Setem|Outu|Novem|Dezem)bro) 1st Alternative(Jan|Fever)eiro Janthe literal text Jan (case sensitive) Feverthe literal text Fever (case sensitive) eirothe literal text eiro (case sensitive) 2nd Alternative(Març|Mai)o Marçthe literal text Març (case sensitive) Maithe literal text Mai (case sensitive) othe literal o (11110 / 1578 / 6F16) (case sensitive)
Abrilthe literal text Abril (case sensitive) Juthe literal text Ju (case sensitive) lthe literal l (10810 / 1548 / 6C16) (case sensitive)
nthe literal n (11010 / 1568 / 6E16) (case sensitive)
hothe literal text ho (case sensitive) Agostothe literal text Agosto (case sensitive) 6th Alternative(Setem|Outu|Novem|Dezem)bro Group 4(Setem|Outu|Novem|Dezem) Setemthe literal text Setem (case sensitive) Oututhe literal text Outu (case sensitive) Novemthe literal text Novem (case sensitive) Dezemthe literal text Dezem (case sensitive) brothe literal text bro (case sensitive) de the literal text de (case sensitive) \d{4}a digit, repeated exactly 4 times
.+any character (except for line terminators), repeated at least once
\d{2}a digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
:the literal : (5810 / 728 / 3A16)
\d{2}a digit, repeated exactly 2 times
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