First of all, it was necessary for you to clarify what is 'Cultural Holidays', presuming it to be festival holidays as it is popularly known, the pro rata accretion is a bit unfair as most of these holidays fall in the 2nd half of the year and those who join then, say in October, will have some grouse. You may consider switching over to the actual incidence of holidays remaining in the year for the inductions of 2022 onwards.