Dewalt cartridge club

What should the "respond by" date be for our wedding invitation response cards? - wedding invitation response cards

It is closed on November 23, 2008, our wedding invitations in the next 10 days to April 18, 2009 post, our marriage. What's the date we have in our "please answer" line our response cards? What is normal? Please help. (We do not encourage customers to choose your tickets now, if not important.)