iPhone calendar: How do you set up an event for next year? I want to set up a reminder for 1 Aug 2021, but there's no way to set the year. All I can do on the scrolling wheel of dates is set it up for this 1 Aug 2020 and add a "repeat annually" to the entry.

Surely Apple haven't missed this off?
Just run the spinner forwards.  Go past the end of this year and you'll be in next year.

Or, go to the date in the calendar first before adding the appointment.