To not want to see friends on weekend

[AmIThough]

Ok it's not as dickish as the title would have you believe.

I'm currently on maternity leave and return to work in the new year.

I have a couple of friends who don't work but whenever I try to arrange to see them, they always want to do things on a weekend.

DP is at work Monday - Friday so I'd rather have family time at weekends.

It's not a case of them not wanting the baby there as they always assume she's coming.
They also don't have any other arrangements that take up their weekdays.

Activities are also generally cheaper on weekdays too because it's off peak.

AIBU to not want to make plans with them on weekends when there are 5 other days that are more suitable?

Have you told them this?

@humbugbug yep - and it gets acknowledged, and then forgotten.

I want to know if I'm being unreasonable because I don't want to keep reiterating my point to then be told I'm being a dick

Is it because they want DPs to go too? Is it because you usually work so they keep forgetting you’re free in the week now? Or they may have activities planned for each week day and are more free at weekends themselves. It’s not dickish to want to meet your friends in the week and see your DH at weekends though. Suggest the next meet up yourself and suggest a week day.

For clarity, DPs don't come if we go at weekends.
Their DPs don't work either so not a case of working around them.
They don't have children and (generally) don't have other commitments so are pretty much free in the week.

When they do agree to weekdays they ask if we can do late afternoon/early evening and I don't understand why

Oh and when I was working they wanted to do weekdays and I've been known to take annual leave to spend time with them!

Why do none of them work??

Are they royalty?