Group 1(January|February|March|April|May|June|July|August|September|October|November|December) Januarythe literal text January (case sensitive) Februarythe literal text February (case sensitive) Marchthe literal text March (case sensitive) Aprilthe literal text April (case sensitive) Maythe literal text May (case sensitive) Junethe literal text June (case sensitive) Julythe literal text July (case sensitive) Augustthe literal text August (case sensitive) Septemberthe literal text September (case sensitive) Octoberthe literal text October (case sensitive) Novemberthe literal text November (case sensitive) Decemberthe literal text December (case sensitive) \s*a Unicode whitespace character, repeated any number of times
\d+a Unicode decimal digit, repeated at least once
,the literal , (4410 / 548 / 2C16)
\s*a Unicode whitespace character, repeated any number of times
\d+a Unicode decimal digit, repeated at least once
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