AITAH for booking my wedding on this date?

My fiancé and I (both 25) got engaged Christmas Eve 2024. We have been together for 6 years, and are not super traditional. Since we already live together and own a house, the wedding isn’t about “starting our life” so much as celebrating the people who helped us build it. We wanted something intimate, meaningful, and worth traveling for since all our family and friends live in different states.

We toured a bunch of Idaho venues and fell in love with this peaceful vineyard overlooking the mountains and river. It felt like the perfect “Idaho experience” for our families, who rarely travel and deserve a beautiful trip just as much as we do.

Here’s where things got tricky: the only Saturday dates available in 2026 were September 12 or October 23. Idaho in late October is basically a coin flip between “fall postcard” and “surprise freeze” so we chose September.

My mom’s side was all in. My dad… not so much.

Some context: my parents divorced when I was 2, he’s lived out of state ever since, and my relationship with him and my stepmom is complicated at best. We’re not super close, and there’s a long history of both sides feeling not-prioritized.

When I first mentioned the venue and the available dates, my dad said he and my stepmom might go to Greece for the entire month of September for her 70th. They hadn’t booked anything. It sounded like an idea, not a plan.

Months later they visited us… and unloaded.

They were upset we’d even consider September. They spent an hour asking why we’re getting married at all, why we care about this venue, why we’re having a party, how hard the wedding will be for them because my mom will be there, and how this is her big birthday year and she deserves to celebrate her life. Basically they wanted us to justify getting married.

My dad even said, “If your mom said she wasn’t available on the 12th, you wouldn’t pick it.” And honestly? My mom would drop anything for me. That’s the difference.

Now I feel guilty. We chose the date, put the deposit down, and I’m worried they’ll show up with resentment or bad energy or not show up at all.

So… AITA for booking a September wedding even though my dad mentioned they might want to go to Greece that same month?