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The original was posted on /r/AmItheAsshole by /u/Comfortable-Bison419 on 2023-09-20 02:42:54.

I don’t think I’m an AH but would like some input. I (F31) have a brother (M23) who is going to have his first baby. My family, meaning my mom, dad, sisters, my husband and myself, are all happy for him. We met up at my moms house early September for dad’s birthday and he and his girlfriend were mentioning the upcoming gender reveal in October. I told him a specific date in October that I had already an event to go to. A friend of mine is celebrating her birthday by bar hopping downtown in a party bus. We are all going to share the cost since it was quite expensive. He assured me that it was going to be on a Sunday. Time skip to yesterday he sent off the invitation to the gender reveal via our entire family’s WhatsApp group chat and it was the exact day of the party. I responded by asking why was it on Saturday and that I had a previous commitment that I had RSVP to. His respond was “ I guess a party bus is more important than a gender reveal.” I reminded him that we had already talked about it. My aunt chimed in reminding us that it is her and another cousin’s birthday. He said that he will not change the date because some if his girlfriend’s relatives are coming from other states. Will I be the AH if I miss his gender reveal?