If you are turning 65 in August then it’s time to apply for Medicare coverage. The Medicare sign up rule is set off of your birthday month. You have seven months to sign up for Medicare – 3 months before your birthday – your birthday month – and 3 months after. So for August birthdays here are the enrollment dates. Miss them and you may face a penalty for life. If you are already receiving Social Security, you do not need to sign up. Medicare will automatically send you your Medicare card.