Change one occurrence of a repeating item

Tick, move or remove one day of a repeating item, the days after it, or the whole series.

In short

A repeating item shows once on every day it happens. Each of those days is an occurrence you can change on its own: tick it done, move it or remove it, and the rest of the series stays as it was.

Before you start

Who: anyone who may edit the item's calendar.
Plan: every plan, Free included.
The item repeats: it was saved with "Repeat" set in its sheet.

Change one day

Tick the checkbox of the occurrence in a lane. Only that day is done; the next occurrence is still open.
Drag the occurrence to another time, or press Alt+Up or Alt+Down on it. Only that day moves. The message that follows offers "Move the later ones too" to move every occurrence after it the same way.
To remove it, open the row's … menu, choose "Delete…" and then "This occurrence", "This and the following" or "All occurrences".
Open the occurrence to see its own day in the sheet. "Done for this day" and Delete there change that day; any other change saves itself to the whole series.

Good to know

"This and the following" ends the series the day before and starts a new one from the moved day, with the same people and reminders.
A reminder never fires for an occurrence that is done or removed.
Snooze is not offered for one occurrence: move it instead.

If something goes wrong

"This item has no occurrence on that day." - the series does not happen on the day you picked; open the item and check its Repeat rule.
"This item does not repeat, so it has no single occurrence to change." - change the item itself instead.