How to define sepecific Payment (payment is due at the month end in which 90 days falling).?

We have to define the Payment term.

Requirement: payment should be due at the month end or a specific date of the month like 15 or 30 after 90 days on Invoice date..

e.g

1- 12-APR-2019 invoice booked

2- After 90 days the date will be 11-july-2019 and payment should be due on 31-july-2019.

Regards,

Rana Hassam javaid