Excel help with a forecast

Trying to create a revenue forecast for a childrens day nursery. Each child has a pooking pattern eg Alice Mon 10 hours, Tue 0, Wed 5 hours, Thurs 0, Fri 5 hours = 20 hours. The nursery is open 51 weeks a year, but also closes on public holidays. For 2018 these are 1st Jan, 30th Mar, 2nd Apr, 7th & 28th May, 27th Aug and it is shut 24th - 28th Dec. What is the best way to calculate the hours for each week for each child making sure that we don't include hours when the nursery is closed? So far I have created a calendar for the next 3 years with all the bank holidays highlighted in red - not sure if I am going down the right route with this.