We're watching the Trooping of the Colour. Mycroft really likes all this sort of thing, and knows a lot about the traditions and stuff. Obviously John knows quite a lot about the different parts of it - different marches, kits, uniforms, etc. Although, to Sherlock's disappointment, John wasn't a guardsman, so didn't have a Bearskin hat and never trooped the colour himself.
Closest I've ever been is as a PC, working on the route. It is a pretty amazing spectacle, I've got to admit. Here (if I've done this right) is a bit of YouTube from last year.
As for everything else going on right now...well, yeah. I don't know. I don't know what to do or not do. I don't know how to talk about it, but I feel like not talking about it might make it worse.
Anyone know a mind-reader? I think John might need one for me.