Hello Harshit,
If you buy any domain for 1 year subscription than your time period will start from that day on which you have purchased it means date of purchasing.
While purchasing your domain you should keep following things in your mind :-
I hope this information helps you.
For further doubts feel free to ask here.
Good Luck!!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile