<the literal < (6010 / 748 / 3C16)
Group 1([^\s<>]*[dD]ate[^<>]*) Negated Character Class[^\s<>]* *matches any number of characters outside the set below:
\sany whitespace character
<the literal < (6010 / 748 / 3C16)
>the literal > (6210 / 768 / 3E16)
dthe literal d (10010 / 1448 / 6416) (case sensitive)
Dthe literal D (6810 / 1048 / 4416) (case sensitive)
atethe literal text ate (case sensitive) Negated Character Class[^<>]* *matches any number of characters outside the set below:
<the literal < (6010 / 748 / 3C16)
>the literal > (6210 / 768 / 3E16)
>the literal > (6210 / 768 / 3E16)
\d{13}a digit, repeated exactly 13 times
<the literal < (6010 / 748 / 3C16)
\/the literal / (4710 / 578 / 2F16)
\1the text saved by group 1
>the literal > (6210 / 768 / 3E16)
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