At the calendar, you can see a better view of the timeline of either one specific project or more relative to each other and in the time at hand. From here, you can choose which project you want to see and monitor and be able to filter out the selection of projects to select via a number of options such as project name or the users who are responsible for certain projects.
The start and end of the bars found in the calendar indicate the start and deadline of a certain project
The colors found above are legends that indicate which tasks are (1) incomplete, (2) complete, (3) outstanding, and (4) Milestone.
Near the top left, you can change the month and on the far right, you can change how the calendar is viewed to your conveniences.