Type in an event, set the time, save.
The round plus button in the lower-right opens a New Event sheet.
Like Soccer practice or Dentist — Sofia. Quieta auto-suggests a duration and category from the title.
Tap the date/time fields to open pickers.
Family (default) — everyone in the Q sees it.
Just me — only you see it; others see a 'Busy' block.
Public — shareable with followers.
Event appears on the Stream in the right slot. You can tap it later to edit or delete.