He forgot which day, AIBU?

[Lololow]

I need a reality check so give it to me straight if I was unreasonable or if he is.

We go on holiday on Saturday, nothing fancy couple hours drive away, no need to check in at certain time (just be there anytime from midday) so can be flexible. I had an appointment booked on Saturday early eve so we hadn't fully decided whether to drive up after the appointment or to go on the Sunday morning although I had told DP I would rather still go that evening so we weren't wasting the whole day.
DP sent me a text today to double check what time my appt was as he'd been asked to cover something at work and he could say yes if it was similar time, in fairness he had written what time was my appt on Sunday and as I was busy at work i didn't quite read it properly and I just replied what time the appt was and thought nothing of it. DP gets home and confirms he will be going into work on the Sunday as I am at my appt and I realised we'd got our wires crossed and I said to him you knew the appt was Saturday we have had a few discussions about it etc. We started to argue. I said why would I have arranged something for the Sunday, I wouldn't want to miss nearly 2 days of our holiday so there was never any doubt my appt was on Saturday. He is claiming its all my fault now because I didn't correct him in the message, I say yes he is correct that I didn't but he's known the appt was Saturday for weeks so surely him getting that mixed up isn't my fault?
He's stormed out swearing at me.

He seems to be doing alot of this lately, the other day he flat denied something he had said 30 seconds prior, when I pointed out that my response to what he just said would have made no sense if he hadn't just said it he then went quiet, stopped arguing and called me a name under his breath. I feel like I'm going crazy the amount of times he denies something he's said or insists I said something that I'm sure I didn't.

But was IBU?

YANBU. He should have used his common sense and realised you had paid for a holiday from Saturday also that you said you wanted to get away on Saturday night, so he should have followed up on the Sunday point.

I'm not sure why you made the appy for Saturday evening though or booked the holiday from Saturday. I would want to maximise the time I am paying for.

It was a mix up.
You could say both of you AB a bit U, but neither of you particularly more so than the other.
If this is your holiday, I would question why you arranged the appointment after you should be on holiday in the first place.
I can then see his thinking of 'If we aren't starting the holiday until late, I might as well work'.
His point that he wrote Sunday in the message and you didn't notice is also valid. It seems that it is okay for you to be a bit distracted, but not him.

Should probably clarify that the holiday accommodation is owned by a family member so we haven't actually paid for it, not that it justifies my appt being a higher priority or anything.
Appt can be rearranged and i did offer to but DP was happy to go afterwards or the next morning.
@UsingChangeofName yes I do agree we were both distracted but we have discussed this several times and I can't understand how he ever thought it was sunday because if it had been the Sunday I would have just cancelled and that would have been that.

I'd say your DH is in the wrong here.

You made a mistake not reading the message properly, but given you're going on holiday Saturday for a week, why on earth would your appointment be on Sunday evening?? That's illogical. You doubt replied with the appointment time, making the fair assumption that he already knew it was Saturday, hence the dilemma whether to go Saturday night or Sunday morning.

So yes you're in the wrong for not correcting his mistake, but him booking work for a Sunday is just really odd. Perhaps he's under a lot of stress at the moment and not thinking straight?!? I've had times where my DH has told me stuff about going out, then when he is about to leave I haven't got a clue that he is going out because he has told me when I was in the middle of doing something else.

I would have said you are both being a little unreasonable but choose ynbu because of his reaction- swearing, storming off, name calling and gaslighting you doesn't sound healthy

My dp is exactly the same Denys what he’s said, does things then blames me for it .. don’t know if it’s an age thing but I’m starting to lose my patience with him it’s like having a 4th child 🤦🏼‍♀️

His reaction is way over the top and that would be the main issue for me. The mix up was both of your fault to an extent but in reality not something worth getting into a row about