Save the dates

short: no
I think if I got a save the date I'd assume I was properly invited, and would then save the date. If I then only got an evening invite I'd be pretty offended.

No!!! It will be seriously awkward as they’ll think they’re invited to the entire day and if they plan their summer holiday around it and only receive an evening invite they’ll probably be really offended and annoyed.

You'll need to find a venue pronto if it's a busy Saturday.

Then you might as well just send real invites with a RSVP for early next year.

No, I'd be annoyed if I'd saved the date and then only got invited to the evening do, would expect all day with a save the date card.

I got save the dates but I got ones with a space on and bought an 'evening invite' stamp and stamped that on. I'm bank holiday weekend next year so for same reasons

I don’t get the ‘save the date’ thing.

If the venue is booked, why not just send out the invitations?

Only send STDs to the subset of guests whose absence you'd really feel. as these arecpeople you are likely to be talking to or emailing anyhow, you can save your stationery and postage bills by just telling them when/where and that they will be invited.

Never send STDs to people who you intend to ask to only part of the celebrations.

Don't send save the dates to evening guests. I'd never actually save the date for an evening invite but they won't know that's what is coming. Like PPs have said, they might plan around it, only to find out it's not the full thing.

I’m gwtting married next July and wondered this as well but was toying with no, I will save myself the bother and not now!