Looking for an on call caring babysitter for two elementary school children

We need a responsible babysitter to care for two elementary-aged children during the time I go into labor. The start date is unknown as my due date is towards the end of December, however it could happen anytime after Thanksgiving’s day. The care will be needed most likely for a whole day until I can have a family member come from a different town and pick them up. The sitter will help prepare simple meals, and engage the kids in fun activities. We are looking for someone who can commit to weekday afternoons or evenings, as well as weekend daytime hours. The ideal candidate should be reliable, patient, and have experience with children in this age group.