Shops and retsurants will all be open 24th though may have earlier closing hours. eg we went to Festival Bay Mall last Xmas Eve at 6 pm and it was just shutting. Very little is open Xmad Day. Some of the shops and fast foods may open with limited opening hours, paricularly the shops owned by Asians who dont celebrate Xmas. If you want a proper meal in a hotel or restaurant if will be reservations only.