Account settings
Timeslot duration
You can change the duration of the time slots for Day and Weekly views.
There are 3 options to choose from - 15 minutes, half an hour, and an hour.
To customize:
Click on the button “Configure Calendar
Choose a suitable time slot
Turn off week numbers
By default, the calendar displays week numbers.
If you need to remove the week numbers, you can do it in a couple of clicks.
Click on the button “Configure Calendar
."Turn on the toggle "Hide week numbers"
Week starts on Monday or Sunday
The beginning of the week is an individual setting. And it depends on the user's global locale.
To change your locale, go to the page
https://id.atlassian.com/manage-profile/account-preferences?ref=jira&src=personalsettings
And choose the language that suits you. For example:
English US - week starts on Sunday
English UK - week starts on Monday
By the way! Count of Weeks will be different for weeks starting on Sunday from weeks starting on Monday, as the standard is different.