In calendar, there is currently no possibility of changing the alert time from 9 AM that I can see.
After years of people asking this same question I find it unusual there hasn’t been an update for it, unless I missed it.
Any of you that have figured it out please let me know
MacBook Air 15″, macOS 15.7
To the best of my knowledge, there is no way to change that.
You can let Apple know what you'd like to see here:
But given they haven't change it by this time, I wouldn't hold my breath. You may want to look at other available calendar apps and see if there is one that lets you do that.
To the best of my knowledge, there is no way to change that.
You can let Apple know what you'd like to see here:
But given they haven't change it by this time, I wouldn't hold my breath. You may want to look at other available calendar apps and see if there is one that lets you do that.
Disregard previous. I think I figured it out. You can't change the default, but you can change it for an individual all-day event.
Alert>Custom>On Date. You can then select the date and time you want. It sort of doesn't look like you can change the time but if you click on it, it's editable.
I read that as the alert time for all-day event notifications.
Even selecting "Custom" does only lets you change the number of days, not the time.
I guess I’m not fully understanding your question. Using Calendar v16.0 on my Mac and macOS 26.2 I can change the ‘alert’ setting by clicking on the alert box which then opens a dialog allowing me to change the alert time in days, hours, etc. There is also a ‘custom’ option to use sound alerts.
Now if you are referring to the ‘start’ and ‘end’ times you click on the hour or minute and a sliding scale opens up.
So what do you actually mean by ‘changing the alert time’? When you create an event the start time defaults to 9:00AM but that can easily be changed.
Add, modify, or delete events in Calendar on Mac - Apple Support
Unable to change default alert time in Calendar from 9 AM
