Why do the statement cycle dates for GreenState credit cards change every month?

Credit cards must have the same payment due date each month; payments for consumer cards are due on the 8th. There are additional guidelines that require how soon before a payment due date the statement must be made available. GreenState's credit card statement cycles vary each month to guarantee no more than 26 days from the date the cycle ends to the date your payment is due. See below for an annual table of this years cycle dates. 

2026