The calendar feature manages how your Gantt schedule is displayed and the level of detail you wish to display in day-to-day use.
You define the time frame of your week view, including, if relevant, the weekend. The work day time frame is also configurable, allowing for the display of up to 24-hour days, 7 days a week.
The main difference between Daily View and Hourly View is primarily in the detail with which the time frames are viewed. Hourly view allows for a view of the time schedule down to the minute, while Daily View displays time blocks down to the hour.
If you would like your schedule detailed down to amounts less than a quarter of an hour, contact Customer Support to enable this feature.