If you spend money by credit card before this month's bill date, the consumption will be included in the current bill and repaid before this month's (inclusive) repayment date.

However, if you spend money by credit card after this month's bill date, then this consumption will be included in the next bill, that is, it can be returned before the repayment date of next month (inclusive).

For example, Blackie has a credit card. The billing date of this credit card is the 5th of each month, and the repayment date is the 25th of each month. Then, his consumption from March/kloc-0 to March 5 will be paid off before March 25 (inclusive). And his consumption after March 5 to March 3 1 was returned before April 25 (inclusive).