You can also add time slots on those dates if you want (best used with week view) or keep them full-day (best used with month view). Add details like meeting name, location, and description, and then select dates.

The app requires no registration to get started, so you can quickly create your new event. If you're concerned about privacy, you can also run it on your server. On top of that, Rallly is open-source, free, and ad-free. Of all the meeting scheduler apps listed above, and several others that we tried, Rallly was the most impressive to use on phones, both as a creator and recipient.