Anonymous Monk,
Let's forget for a second that this looks like a URL and you should be using a module from CPAN (see this search for some ideas). What you are really asking is to get what is between the first quote and the last quote. This assumes there are no quotes that are escaped in the date.

/"([^"]*)"/
[download]

This is called a negated character class. See Death to Dot Star! for more information.

Cheers - L~R