Employees are entitled to two unpaid holidays per calendar year for a reason of faith or conscience or an organized activity conducted under the auspices of a religious denomination, church, or religious organization. The employer must allow the employee to take the unpaid holiday when requested unless the employee's absence would impose an undue hardship on the employer or the employee is necessary to maintain public safety. For this purpose "undue hardship" is defined in WAC 82-56-020.