Is it ok that my husband knowingly planned a guy trip over Mother's Day weekend?

My husband knowingly planned a guy trip 4 day weekend over Mother's Day... We have a 1 yr old and a 7 yr old. I don't feel that I should have to watch the kids for 4 days over the ONE weekend that us mother's get once a year. He even had admitted that he could move it to the following weekend. I wish he would just recognize my feelings and that I would appreciate him caring that it would mean a lot to me to have him in town that weekend. And just so everyone knows, he goes on these trips atleast twice a year and rides on weekends when it is nice out and I completely support him.