And provided further that the employer may grant the employee any other day as a paid public holiday in substitution for any of the public holidays referred to in paragraph (1)(b). (1B) Where any of the public holidays or any other day substituted therefore as provided in subsection (1) or (1A) falls within the period during which an employee is on sick leave or annual leave to which the employee is entitled under this Act, or falls during the period of temporary disablement under the Workmen’s Compensation Act 1952, or under the Employees Social Security Act 1969, the employer shall grant another day as a paid holiday in substitution for such public holiday or the day substituted therefore.