Verified answer

There is sooo many different Da Capo's

If you had to decipher which season is which by title alone, it would be impossible. So check out this site below to see the years they were made.

http://anidb.net/perl-bin/animedb.pl?show=animelis...

I have watched the first one, but i stopped after that, as far as i know the seasons are not all direct continuations of each other. There is probably similarities though. (same town, similar characters, or children of previous characters)

edit: lol your guess is as good as mine. Read the descriptions, and check the year they were released. My guess is watch them in the order they were made.

also note there are repeated listings on the site i gave you. Not everyone of them is a different Da Capo series, just some that are listed more than once. Just look at the pictures you can tell which is the same.

I think those are two different seasons?