How do you calculate valid service time after a purchase is made for YI Cloud Service?

We hope that you can start enjoying our service as early as possible, so YI Cloud Service is enabled right away once you successfully make a purchase. If there is no active subscription, the subscription start day is 00:00 of the next day. For example, if you sign up for the 15-day loop recording subscription on 9/1/2016, the subscription start date is then 9/2/2016 00:00.