I can explain the practice which we follow in our organization (MNC).
Compensatory-off policy
The Compensatory-off must be availed by the employees within 30 days. They cannot avail of CO after the expiry of 30 days.
For example, an employee who has worked on Jan 1, 2022 (a holiday) and is eligible for CO will have to avail it on or before Feb 1, 2022.
This cycle continues irrespective of the calendar year.
For example, an employee who has worked on December 25, 2021 (a holiday) and is eligible for CO will have to avail it on or before Jan 25, 2022.
Hope this helps.
Regards,