At what age do you send your child to school ? Why

I send my child since he was about 8 months oldm reason being there is no one to help, I have no external family or friends who can help. so it's just me and hubby 365 days a year without a break. also when baby goes to school, I can do self care which will help baby too. that way my tolerance level can replenish. whilst he is at school, it is better that he has other babies his age, and things to stimulate him.