I got engaged on the 10th Jan this year :). We told everyone we were keen on a September wedding as this works best for both myself and my fiancees parents work schedules. My brother and sister in law gave us a raft of dates in September that would not work for them. This, combined with a few dates that we could not do due to prior engagements left us with no September weekends :(. Unless we went for a Friday...So we decided the 25th of September could work well. The 25th happens to be the Friday before one of the weekends my brother and sister in law said they could not do. That weekend they are gathering with my sister in laws sister as a sort of weekend before her wedding get together. Since telling them of this proposed date they have said that it will not work for them for 2 reasons. 1, They think it is rude to have our wedding 8 days before my sister in laws sisters wedding (something about stealing the limelight, but honestly it has nothing to do with that and my sister in law said that she knew this was not the intention) 2, They feel it will interfere with their weekend pre-wedding get together with my sister in laws sister as it is on the Friday prior to this. I would never take offence if someone booked their wedding in the week before mine and my fiancee feels the same but clearly my brother and sister in law do... so am I being unreasonable/rude?