Change billing date
FYI
Trying to cancel this within30 days of the annual fee bill date. When I activated the card the billing cycle date was 12th which means I have to finish buying on the 7th or 8th of this month. With only a 5k limit it is hard to do(citi is very slow at posting pending transactions).
I was able to change my billing cycle date to the end of the month (didn't have to wait until the 2nd month)over the phone. This will give me additional 20 days to buy the ice cream.