Following the steps described here to use ISO8601 standard in Date Picker does not reflect when using the new issue view.
There is no current workaround
Steps required after fix
The first day of the week in the date / date & time fields is controlled by the locale you have set and is a per-user setting.
You can set it in your profile settings (https://id.atlassian.com/manage-profile/account-preferences) under "Language & Region" -> "Language".