Calendar view outlines the issues from the projects configured that matches JQL defined and statuses mapped. The issue will be shown on the Calendar from the moment it was moved from one of the un-mapped statuses to one of the moved. Transitions within mapped statuses will be show on time with appropriate color coding. The finally the bar will end when issue is moved from one of the mapped statuses to un-mapped.
To move one month forward/backward you can use the following navigation
Click also on “This month“ to scroll to today.
If time tracking is enabled Calendar view will show all worklog made as “clock“ icon. Once you put a mouse of it you will see the details about time logged specific date plus comment as well as total time logged for the issue.
If you want to log more time directly from the app put a mouse on intersection of the date and task to click on “plus“ icon.
A dialog will show up to log your time
You can also change the date from the dialog if you clicked on the wrong one.