You can add a holiday entitlement to a post by following the below steps:
Click either the Admin menu or Configuration, depending how you have your system configured.
Click Post Setup then search for the post you want to add a holiday entitlement to.
Click Absence then click Leave.
Click Edit next to Holiday Entitlements.
Here you can select the Holiday Entitlement.
📌Note: Once you have selected the holiday entitlement to the post, you can then run batch updates on the system, this then updates the employee's entitlement on their profile.