For example, if you spend before 19, that's how it works. In other words, on 19 every month, check your credit card bill to see if it is overdrawn. If it is overdrawn, it will take 20 days from 19, and the money will be paid back before the 8th, which means that you have a 20-day interest-free period. If you spend before 19, you should return it on the 8th, because there are still 20 days before 19.

? For example, if 65438+ 10/00 yuan is overdrawn on October 8 and must be repaid before February 8, then you have a 20-day interest-free period. The shortest day is: 65438+ 10/20 October, from 65438+120 October to February 19.

I don't know if this is clear. Anyway, whenever you spend money, it's 20 days from 19 of the current month, and you must return the money within 20 days.