https://www.rsjoomla.com/support/documentation/rseventspro/frequently-asked-questions/how-to-change-the-event-editing-calendar-start-day.html
How to change the event editing calendar start day
Starting with RSEvents!Pro ver. 1.8.0 a new calendar was introduced for the front-end and back-end event editing layout.
how to changethe eventediting calendarstart day
https://community.atlassian.com/forums/Confluence-questions/Editing-Calendar-Events-edits-the-dates/qaq-p/2309207
Solved: Editing Calendar Events edits the dates
Mar 27, 2023 - Solved: Hello - Having difficulty with Confluence Calendars. When creating events, they are "all day events" for multiple days in a row.
editing calendarsolvedeventseditsdates