Within Planner, more specifically within the Plans section, you will find an interactive calendar. This calendar reflects the intensity of your last year activity per day, represented in green tones. The darker the color, the more plans/stops you will have made on a given date. On the contrary, gray colour represents that there has been no activity.
Why interactive? By making 2 clicks (one for the start and one for the end date), you can define a period. Thus, you will be able to visualize the result of your activity on certain dates.
Note: If you do not want to see this calendar, you can hide it by clicking on the arrow in the upper right corner.