Basically, the billing date is calculated on the day you open the card; the billing date will be different for everyone; you can consult the customer service of your card-holding bank;

Assume that your billing date is The bill date is the 10th. The bills spent between the 11th of the previous month and the 10th of this month will be issued on the 10th of the following month. Basically, you can see the bill details sent to you by the bank on the 11th, and the repayment date is based on the bank's repayment date. For example, if the bill comes out on the 10th, and the repayment between the 11th and the 28th is interest-free, the consumption during this period will be automatically recorded in the next month's bill