No. We are encouraging you to quit for as many days as you can during the 7-day period – consecutive or not. You may quit from Monday-Wednesday, have a slip Thursday, and try again Friday. All the days you stay quit will count and will give you more chances to win a prize!
Registering for the contest gets you one contest entry, but if you want more entries, try to quit for more than one day, and don't forget to fill out the contest submission form sent to your email at the end of the week.