positive look behind: it does not consume the first character, so it can be used for the next match flags=re.I is to ignore case sensitive

Matches dates in the following format: %Y/%m/%dT%H:%M:%S This is 24h format (00-23h) and no leap seconds.

Matches dates in the following format: %Y/%m/%dT%H:%M:%S This is 24h format (00-23h) and no leap seconds.

Final version used in script.

this regexp will extract the homepage from an url; it will factor in the "www" if there is one, and it will accept a slash at the end

Matches every sentence in your string