Date issue: I want user to ONLY select date which is after 48 hours.

Date issue: I want user to ONLY select date which is after 48 hours. (means the date should be selected of after 2 days). I want to lock all the other dates.
Example: if today is 4th October 2017, then only date should be visible on the date picker should be 6th October 2107 and all the other dates should be locked.
Same goes on, if today is 5th October 2017, then only date should be visible on the date picker should be 7th October 2107 and all the other dates should be locked.
I hope now you have understand my query.
Kindly response me with the detail solution so that I can built the form.

You can set up the date picker properties start date like the example below

today+2, means only the dates after 2 days can be selected.
You can read more of the guide regarding the date limitations on this link https://www.jotform.com/help/337-How-to-Use-the-Date-Limits-Option

 Let us know if you need more help.

That goes the same for the end date. You can put "today+2" to only limit other days aside from 2 days after the starting date.

Now I want user to ONLY select date/ time which is after 8 hours.
How can I do so?
...

Unfortunately it is not possible to limit the time unless you download your full source code and remove the hours you don't want to be selected