Some clarification, if you did not understand:
Example:
You registered in the billing on February 1, 2012 at 12.30.
You purchased your first subscription at 12.45 of the same date.
It means, that your first subscription will become active already at 13.00 (the first nearest hour after you purchased your subscription) and after 13.00, you are able to watch TV. The first day of your subscription will be considered free (bonus from the server), though in the billing, you will see that your subscription starts from February 2, 2012. (1.02.2012 is bonus to your subscription!)
If you were late and purchased your first subscription at 13.20, it will become active from the next morning after 6:00 AM (Moscow time).
Hope, this is clear?