It's not the end of the month, it's based on your card opening date. First of all, if you open the card on the 1st of this month, that is, on the 1st of this month, your bill will be generated on the 1st of next month, and it will basically be paid back before the 20th of last month. Generally, the interest-free period of bank credit cards is 50 days, and no interest will be charged at this stage. Interest will be charged afterwards.