We added an enhancement to make it easier to select dates on the internal calendar. Now, instead of clicking each day one by one, we have the option to click the first date, hold down your mouse, and then release on the last date of the reservation. This will select all dates in between, as seen here:
It is also possible to select two units at a time this way. The unit where you start the click will be selected, as well as the unit where the mouse is released, such as seen here: