DP (looks after our two children while I work) has known for a couple of weeks that he needed to go on a course today. He told me this and I put it in our mutual calendar for him (he doesn't do calendars) so nothing would accidentally get booked over the top of it (by me).
Of course, we'd need someone to look after the kids during this time, and he assumed that as he'd asked me to put it in the calendar, I would sort it for him. He says he asked me to ask my parents. Perhaps he did. I can't recall.
The day before the event (yesterday) he reminded me about the course today. I'd forgotten all about it, despite him mentioning it in passing a few times (apparently) over the weekend.
Turns out my parents are busy. He called his - his are busy too.
I've had to take time off work, forcing the small office I work in to be actually closed for an hour due to unavailability of other staff.
Am I being unreasonable to suggest that in future he takes responsibility for organising his own babysitters for his own needs? In good time. Not the day before!
He's spitting feathers. It's all my fault. I should organise these things for him apparently.