AutoScroll is enabled by default in the Calendar component for drag-and-drop operations (moving, resizing, and time range selection).
You can set the value of the autoScroll property to "Always" to enable horizontal scrolling when the mouse is moved near the viewport edge.
Of course, the horizontal AutoScroll will only function if the column width mode is set to fixed and the inner width exceeds the viewport width, which in turn activates the horizontal scrollbar.