What would you do - child v job?

My daughter starts Kindergarten this year and I was offered a job as a substitute after being a stay at home mom for 6 years.

Problem: I just found out my job orientation is the same time as her Kindergarten orientation.

We have talked about orientation a lot because she is very nervous. She expects me to be there. After three months of reassuring her I will go and six years of her knowing she can count on me, I need to be there. This isn’t hula day at preschool; Kindergarten is a major milestone!

My husband says I need to go to my orientation and miss hers. It isn’t a big deal to him since he misses some things because of his career. I am taking a job that will pay $10k/yr max. We do not need the extra income and, according to our agreement, I am not even expected to look for a job until she has already started school.

He says I’ll “get over it.” He will get over me missing my orientation long before I get over missing hers. We’re heading for an argument.

I woke up this morning as a stay-at-home mom and am going to bed as a parent who misses her child’s events because of work. I am heartbroken.