Explanation
A Vault Admin may still access a safe outside of the hours that it has been configured to be accessible, as long as he has the Bypass Safe Time Restrictions authorization on the Vault. The Bypass Safe Time Restrictions authorization enables a user to access any safe in the Vault, regardless of the time restrictions that are defined for that safe. This authorization is useful for emergency situations or maintenance tasks that require access to safes outside of the normal working hours. By default, the Vault Admins group has this authorization, as well as other administrative authorizations on the Vault1.
References:
* 1: Vault Member Authorizations