Yes, fine. I'll just note it down in my diary. That's Monday, 24th April. Right, I'll be at your place at 11 o'clock. Hope I haven't messed up your arrangements too much.
But, after I moved to Tokyo and lived there for a number of years, I got used to having a pile of to-do lists, and my calendar always looked like a mess, with loads of things to do written across it.