He took 18 hours to reply to my text, is this a lot?

undercoverirish
We had started to organise plans on Thursday for Sunday night but we hadn’t confirmed the diner details.

I sent him a WhatsApp yesterday morning at 11am asking him if 7pm tonight was ok? He didn’t reply to the message until nearly 4am this morning to say yes ok!

Is that acceptable do you think?
He took 18 hours to reply to my text, is this a lot?
6 Opinion