according to your situation, let me give you an example.
Your billing date is: 2th of each month
Repayment date is: 8th of each month
Suppose the credit line is 3, yuan
For example, you spend 3 yuan on June 1st, 5 yuan on June 3rd, 2 yuan on June 15th and 1 yuan on June 19th,
.
you will receive the bill on June 2th, and the repayment amount shown in the bill should be 11 yuan.
before July 8th, the 11 yuan is interest-free. Since July 9, it is not interest-free, and interest is calculated. That is to say, your interest-free period of 11 yuan is 38 days.
Because you spent money in 3 yuan on June 2th, that is, the billing day, this 3 yuan is not included in last month's spending, because the billing day is the spending before : on June 19th. Therefore, your 3 yuan is recorded in the repayment amount of next month, that is, when the bill date is July 2th, it will show the consumption of 3 yuan, and the repayment date is August 8th. Then you can enjoy the longest interest-free period of 51 days for the 3 yuan you spent on June 2th.
Simply put, you can enjoy the longest interest-free period for the consumption on the billing day of each month. By analogy, the closer the bill date is, the longer the interest-free period will be.
I don't know if you understand.