Invitations

5 months is way too soon. You could send out save the dates in October. But invites never go out before 8 weeks from the wedding. People lose them and/or think you are having tiers of guests. Wait till January to send them out.

That is way too early. Most people won’t start planning ahead like you hope they will because most destination weddings are being cancelled. Save the dates would be best. Include the date, location and wedding website if you have one.

Yes I think that is too soon. If you're worried about it being near a holiday, etc. then you could send out save the dates.

I think destination wedding invitations could be sent out a little earlier than normal, but I think 4-5 months before is too early. I would suggest maybe 2-3 months before the wedding? January would be a good time. Like other comments have said, October would be a great time to send out Save The Dates if you haven't sent those already.

Yeah I would maybe send them out sometime in the new year

Give people a heads up, but do not send invitations early.
If you do not want the expense or trouble of Save the Date Cards, do what we did before that, and most local weddings do still. Call or e-mail . For email, you can copy the same content onto all, but address each one separately, so they do not get thrown in the trash by spam filters. Wait until 10 weeks out at earliest, to mail invitations, so people will receive them at 8 weeks.
When you call with Save the Date info, you often get useful feedback, that you do not get with mailed STD or email. Often people who know of conflicts now , from being in other people's weddings to moving for a job, or having a baby, will tell you so. ( We cannot possibly make it. Our daughter.....) At this point, you can say, should I still send you an invitation, in case things change? If they say don't, cut them from the list now. It is not bad manners to add to the guest list after people say no to advance information. Having an alternate B list of people in case first ones turn you down, only matters with actual invitations , sent out weeks after most others. But there is no issue with only giving advance info to some and not others, basically, to those needing extra early notice. And sending notice later, or only sending an invitation at the usual time. ******** Several people let us know they could not come, and after calling with early notice info,all declines except 3 maybes dependent on jobs or babies , had told us, we have a conflict. Knowing we were planning for 170-175 not 200, months in advance, made a difference to our planning. we did mot add anyone. But verbal feedback from doing phone calls made things much easier, further out.

I think it’s a bit early especially because who knows what will happen with Covid and restrictions. I would at least wait until December