guys .. wanna ask .. whats the diff i go on weekday / weekend ?

Guys ..
I just bought 2 tix from their online site..

I've selected the date of visit to be on next sunday.

However, when the ticket confirmation is out - the travel period is stated fron nxt sunday until nov .

Does this mean i can choose anytime i wan to go until November ? or do i still need to make any confirmation with USS which date im going ?

Thanks