Urgent! A question about a recipe: Airy Rosemary Citrus Pignole Bread Pudding

I have a question about step 8 on the recipe "Airy Rosemary Citrus Pignole Bread Pudding" from gabrielaskitchen. It says:

"Place the baking pan into a larger pan or roasting pan. Pour enough hot water into the outer pan to come halfway up the sides of the pan containing the bread pudding. "Can I make this bread pudding two days ahead of time? I need it for Christmas day but I am in charge of all the desserts, 3 of them, and was looking for some do-aheads. Thought the bread pudding would do nicely.