How to get range and initial value at the same time?

[smartm0use]

Hello, I'm using 2 calendars to have a date range.
If users set a date in the first calendar, then the days are highlighted in the second calendar, starting from the date set in the first calendar.

Is it possible to set the date of the first calendar as initial date in the second calendar?

https://jsbin.com/temosuboqe/edit?html,css,js,output

[ijunaid8989]

how you solved it?