Customizatation for multiselection

[sahil-saini-onebcg]

I have requirement to have calendar to select multiple dates:- When a date has been selected, all dates will be disabled, besides the dates 4 days or less after the lowest selected date or the dates that are 4 days or less before the highest selected date.

Means if i select dec 13, 2017 then it would disabled all dates except dec 10,2017 to dec 16, 2017. And again if user select 15 dec, 2017 then it would disable all dates except dec 12,2017 to dec 16, 2017. Means have to check only on highest and lowest date selection. Nothing will happen if user selects dec 14, 2017.

Need support.

Thanks in ADVANCE