<human>: For some background: My brother and family moved out of province a few years ago and we kind of lost touch. My SIL has never liked me and was downright cruel to me as I was growing up (she's 16 years older). My brother and niece/nephews are cool, though.

My fiance picked November 2nd as our wedding date. Halloween is our favourite holiday and we wanted the Saturday closest to it. We've already started booking places and things. Turns out, November 2nd is the day my brother got married. Now, this happened 13 years ago and I was 12 at the time and I honestly remember very little about their wedding.

My SIL absolutely flipped her shit when she found out. She called me a selfish bitch for taking her day away from her. She thinks I did this maliciously. She planned her whole life for that day and I'm trying my best to outshine her by making it MY day. Even if I didn't know the day, there's no way I would forget that it was in November. I honestly had no idea and I would change the date if I could just to get rid of this drama. As it stands, she said neither she or her family would come to the wedding and she cancelled my nephews trip to visit this summer.

I'm not even sure what I should do about this. I'm trying to see this from her perspective, but even if my little brother chose the same date, the only way it would upset me is if it was the same year. I'm going to try to talk to my older brother when I get a chance, but SIL is too volatile to reason with.

I guess I'm just wondering if anyone has a similar experience or any advice. And really, I just wanted to rant a bit to people who aren't involved. I hate drama.

Can you summarize the given text in a few sentences?
<bot>: Learn all the days when friends and relatives were born, died or got married. Do not get married on any of those days.