31 days.

According to the query of Weibo, the hosting service is usually provided in a month, and a month is usually considered to have 31 days. This is based on the number of days in most months, because some months have 28 or 29 days, but for the convenience of calculation, a month is usually regarded as 31 days. In the custody service, whether catering, accommodation or other services are provided, it is usually charged for one month. This includes the time from the beginning to the end. For example, if the hosting service starts from the 1 th to the 31 th, then the fee is calculated according to the whole month.