Clicking on particular date in date picker SysMonthCal32 does not work.

I have a date picker which is SysMonthCal32. I am able to get the particular date as GUIObject by turning on MSAA for this control. This GUIObject has click actions like click, dblClick. The script does not fail when I do a GUIObject.Click, however the action cannot be seen on the control. 

However, if I put a key action, like dateGUIObject.key(<some_key>) and do dateGUIObject.click, the action can be seen. 

Any idea, why is this happening?

Is there a better way than doing this way instead of adding the extra key action.

Thank you.