How holidays and weekends can be mapped without OTL?

Hi All,

My client implementing Core HR, Payroll, Absence Management, SSHR in R12.1.3, so now the requirement is how we can capture the Annual Holidays every year and weekends, so that if employee uses self service -> Absence Management Function, system need to throw an error if they apply leave on holidays or weekends.

Is Calendar events help me out in this case, if yes guide me.

Few of my other clients who implemented Absence Management, they using the custom forms or custom functions to achieve this requirement, can anyone help me is there any way how to map this using standard functionality.