It is recommended to expire a holiday rule rather than delete it.
An expiry date can be applied to a holiday rule, which will prevent it from appearing in listings to assign to holiday year records.
To expire a holiday rule, follow these steps.
Click Absence, then click Lookups,
Click Absence, then click Holiday Rules.
Select the Holiday Rule that is no longer needed.
Click the Details tab, then enter an Expiry Date.
Click Save & Return.
The listing is defaulted to filter out expired holiday rules.