Re: Apple Calendar on Mac:" if the date is 2025 05 31 and i now want to change the entry to 2025 06
16 The curser will not move off 2025. the time is the same issue"
In the calendar window : Month view: Try dragging the entry from May 31 to 16th June. Then double click the entry to open it in a small window, where you can view / edit any details.
or
if needed: Scroll to "Modify an event: in Apple Support's article (link below):
Add, modify, or delete events in Calendar on Mac - Apple Support
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Useful Resource: Calendar User Guide for Mac - Apple Support