Task calendar
Task completion dates are displayed in "Task calendar" view. Each task is displayed as a triangle in the column with the date of its completion. If a task has a start date as well as a completion date, it will be displayed as a block that extends from the column with the task start date to the column with the task completion date.
Settings for "Task calendar" lists
In a list's settings, you can define which tasks will be displayed in the list, and you can configure various aspects of how they will be displayed:
The following options are available:
Type of objects displayed in a list
Object selection parameters
Calendar grid settings
Link for exporting a calendar in iCal format
Google Contacts sync block
List heading color
Use full form setting
Automatically collapse empty lists setting
Task/contact card display