10 user license starting time line?

[SFTech]

Does anyone know the starting time line on a 1 year 10 user license?
   -Does the year start when I install the 1st copy or does the year start on the date of each install?

I want to buy copies of Avast for several customers and keep some on hand, a 10 user license would be great.  I've searched Avast but can't find the timeline of the software and I'm concerned if I buy 10 users they'll all start on the date of the 1st install.  Do you folks know or is there a link to this?

Thanks in advance,
SFTech

[igor]

The license validity starts at the moment of purchase.

[SFTech]

Thanks igor.