try with this selector…
To Select 4th Sept
<html app='chrome.exe' title='MakeMyTrip *' />
<webctrl parentid='root' tag='DIV' innertext='Sept* 2020*' />
<webctrl tag='P' aaname='4' />
To Select 4th August
<html app='chrome.exe' title='MakeMyTrip *' />
<webctrl parentid='root' tag='DIV' innertext='August* 2020*' />
<webctrl tag='P' aaname='4' />