I want to show two months using bootstrap datepicker. After search on google I am not able to find how to show multiple months using bootstrap datepicker. I found that I can
To expand on what vic said, the jQuery UI can be used with Bootstrap but it may not be worth the effort. See this post from SO:
Can I use Twitter Bootstrap and jQuery UI at the same time?
You may find that this datepicker has more options that could give you what you need... I don't see multiple calendars though: http://eternicode.github.io/bootstrap-datepicker/
I would also consider that the jQuery UI look and feel may look out of place with the bootstrap look and feel, though that's just my opinion.