I have a business project. If creating new issue from "Calendar" view due date and start date fields are filled according to clicked date but date format is invalid and needs to be changed.
It seems like a bug but I'm new to it so maybe there is some configuration issue. It actually worked as expected before I changed date formats.
My current configuration:
Settings -> Look and Feel

Settings -> Advanced settings

Values that are automatically set in Create Issue date fields

My account currently uses English (UK) language. If I use Estonian language then autofilled value in date fields uses same date format but months name would be in Estonian e.g. "10/Jaanuar/2022"