Is there a way to change the default snooze time in Windows Calendar?

Solution 1:

It appears to not exist yet.
Vote here for Windows: https://outlook.uservoice.com/forums/322590-outlook-for-windows-desktop-application/suggestions/13887996-option-to-apply-default-snooze-time-for-reminders

and here for Mac: https://outlook.uservoice.com/forums/293343-outlook-for-mac/suggestions/31817122-allow-the-default-snooze-time-for-calendar-reminde