Nepali holidays library for EMACS calendar.
install the package nepali-org-calendar or copy paste nepali-org-calendar.el into your config file and:
(setq calendar-holidays (append nepali-holidays))this package only provides the variable nepali-holidays and you have to append the variable to the calendar-holidays list.
~ M-x calendar ~ -> click on the date and press r to see the if it is a holiday in minibuffer.
or in org-mode: ~ C-c . ~ -> opens up the calendar and press r again.