How to select month in calendar using xpath

we have explained date picker in videos. have you watched it?

Yes, I have tried module 15, Makemytrip class from the video, that is when I encountered this issue.
Are you referring to the same video?

yes, how is it changing the month?

It has to do something with the indexing of months in the calendar on the website , Makemytrip.com
Whichever month we select in the function, previous month is being selected.

I tried giving the date as 12.12.2016 in the function, what was selected on the website was actually 12.11.2016.

so if you select 12.1.16 what does it do.

Cannot go back to past months as back button is disabled.

try with 12.1.17

I tried with 12/01/2017, it is selecting 12/12/2016.

then when selecting date add 1 month.

if you want to select 12/1/17 try to select 12/2/17 and so on.