Trigger macro on click

Hello forum,

I have made a macro to activate a pop-up calendar.
Right now the macro is activated either by right clicking and choosing insert date OR by holding down the [CONTROL] and [SHIFT] keys and pressing [C]
I want the macro to be activated every time I click on specific cells, that is column B and column H.
Is that possible?

I attach the file, the macro is called OpenCalendar
OB Wheel.xlsm

Many thanks in advance
Ioanna