My brother is getting married in a couple of months and we are travelling from Australia for the wedding (and to see family and friends obviously). We're not the closest family in the world, but we get on ok, at the moment (the distance is very helpful) although DH has never got on well with my parents, and vice versa.
DB's a lot younger than me - he's 28, my DH is 50 (I'm nearer 50 than 40, sob...). When asked about dress code a few months ago DB obviously hadn't given it much thought, but eventually agreed that lounge suits is probably about the mark. I thought our plan was for DH to buy a suit from M&S when we are there, as the quality's better than over here. Even though he rarely wears suits for work his other ones are 7+ years old so he could do with a new one.
DH is now saying that he will wear a new pair of these : blazerclothing.com.au/collections/pants/products/hawthorn-stretch-twill-pant-dark-navy?variant=16404808773 which he currently wears to work, with a shirt and tie. I'm wearing this : www.floryday.com/Polyester-Floral-3-4-Sleeves-Mid-Calf-Cute-Dresses-m1027961 - it was very, very cheap from another site and I thought quite weddingy and a bit different without wasting money on a one-off wear. As far as I know there's no "wedding party" role, no matron of honour / ushing required, we're just going to be milling around, but I just don't think those trousers are smart enough for a wedding guest. I would be mortified if he wore those to a friend's wedding, and to wear them to my brother's seems like a deliberate two fingers up to my family. I am (sort of) prepared to be told AIBU though, I know it's August, in the UK (albeit about the same as a nice winter's day here, it's 25 degrees here at the moment, first week of winter) and a suit will be slightly overkill but at our age it's hardly about the fashion show is it?