In Lotus Notes how can you change the date format?
Notes doesn't seem to provide a way for an ordinary user to do this. This article describes how to do it with Domino Designer.
The format isn't fixed as a search turned up various posts with different date formats. Some users suggested that changing the Windows Regional Settings will change what Notes shows. I tried this and it didn't have any effect.
In Windows 10, choose 'Additional date, time, regional settings'; choose 'change date, time or number formats; under 'Language Preferences' 'Long Date' ignore the dropdown options. Manually type d mmmm yyyy.