My fh and i Can't Agree on a Date

My FH and I have been together for 3.5 years and have lived together for 2.5 years. He proposed to me on New Years! And it was the happiest day of our lives.


We both really liked the idea of a Spring or early summer wedding. Obviously 5-6 months is not enough to plan. I am 35 going on 36 this year. And he's gonna be 38 this year. I don't want a 15-18 month long engagement. MBoth of Our parents want us to get married this year. We are fortunate enough to have our parents pay for the wedding. My parents are planning the entire thing with my help of course.
Our parents wanted us to get married in September. My FH said that's too soon. But he says it's totally up to me and I get to make the decision.
We found the perfect venue with all of the things we both would like. They have dates this year in November. I was able to reserve the date just in case. I told my FH I reserved the date, and he still thinks it's too soon.
I asked why. And he said it's too close to Halloween and worries about guest with kids coming from out of town possibly missing Halloween......I went over the pros and cons of getting married sooner rather than later. And he just said he thinks it takes 18 months to plan and wants to enjoy our engagement amd not be stressed.
I'm getting frustrated because both of Our families love the date. I love the date. He doesn't have to worry about planning. He still says it's up to me and I get to choose. I just want him to be on board. I just don't know what to do. Any advice?

II