I have too many memories of gloomy, wet and cold BH’s from my childhood to think kindly on having any more of them! In Scotland we also have ‘Holiday Mondays’ which are local holidays, but each town has a different one. Before the internet, I gave up going out on Mondays in summer because you never knew which town was closed when, although it would sometimes be two Mondays a month.
It astounds me even now that some small towns in tourist areas still have holiday Mondays and you see visitors morosely plodding around in vain looking for something to do and something to eat.
Personally, I’d give everyone the same number of BH’s added to their holiday entitlement and then they could take it when they want, not when someone else dictates.