From someone who got married on a Thursday in my home city, 60 miles from my husbands we didn't really think what anyone thought of us tbh.
We booked our wedding & invited people, I will add that ad it was term time we did give every family with children to do what best suited them. For example if taking children out of school was OK then bring them, if not then come without kids, if childcare over night is too difficult with school run mixed in we also understood.... few months notice to rsvp no pressure.
Same as a weekend wedding would have been..... you can either come or you can't, we're getting married either way. You'll never please everyone.
Will add that everyone we invited attended, even evening guests travelling that we couldn't justify of the day time, every single person.
Sick of people thinking brides and grooms have to have a wedding to suit everyone else so no it's not unreasonable at all. I had two cousins that are teachers who got special permission from their head teachers to attend which I was ecstatic about be abuse I genuinely thought it wouldn't be possible but for the sake of 2 cousins attending I still didn't consider changing to a weekend. All of both of our families work and there's many different jobs and professions but everyone made it.
Had it been on a weekend I know some family members would have still had to ask for leave so you can't win either way.
You're not being forced or summoned you're being invited. Sorry we're not all mon-fri 9-5