Vacation Calculation - Pay Date vs. Pay Period End Date

Hello Community,

I'm hoping this is a quick and easy question for you to answer.

I was wondering when it comes to vacation time - is the time being recognized from the:
(a) Vacation Calculation Date to the Pay Period End Date

                                    OR

(b) Vacation Calculation Date to the Pay Date

PDBA Setup:
- Calculate only during 1st period worked of month by pay period end date

- Limit Method: Payroll History Month

- Table Method: OA (Amount x Rate/Basis = Months)

If you need any further information to help answer this, please let me know.

Thanks for your help!