Looking For A Reliable Sitter For Our 4.5 Year Old

We are looking for someone who is reliable and can come on short notice. We live in Santa Fe and have a brand new, large playground close by! My son attends preschool at Kid's Campus at SFCC and I work for SFPS. There are days where his school is closed and I still have to work. We would always try and give at least 2 weeks notice for scheduled closures, but also will have unexpected closures where I need someone asap. On these days, the hours would be from 8 a.m. - 3:30 p.m. (I can leave a little earlier if needed). We are also looking for a 1-2x per month date night sitter! We like to take a few hours to go to dinner and would just need someone to put our son to bed and hang out until we get home. Our son is a very independent, sweet, sensitive, and easy child. He loves meeting new people and communicates well.