No, you will not. The free 1GB Data validity will follow the 24-hour duration or your plan renewal/expiry time-date, whichever is earlier.
One user can only redeem the free 1GB Data once every 24 hours. Therefore, in this case, even though your free 1GB Data has expired at 9 am on 15 May, you can only redeem another free 1GB Data at 8 am on 16 May.
To maximise your free 1GB Data usage, we recommend redeeming your free 1GB Data after your plan renewal if you know your plan will renew on that day.