If the times are Z The 7th and the 14th are days off and you will get away with it
If these times are local then you are in heavy Karma
FOR Z
I am assuming 2 clear days with 3 local nights 4th and 5th
12th is a working day which
The 13th must be a day off to gain 1 day in 8
The 18th and 19th must also be days off to gain 2 days off in 14
The flight on the 17th cannot be delayed past midnight
FOR LOCAL
By reporting before 0600 on the 8th and 14th the crew has negated the day off on the 7th and 13th so has already worked 10 days without a day off and is planned to work 13 with only one day off.
Could not be bothered to check if Acc hours are ok.
As for days off companies follow differing systems, I always preferred if it was within a few hours of midnight you could take the payment but risk being put on a Standby when you come back into hours, after all you have accepted the day as a working day.
For major encroaches then you are given the payment and stood down.