For assistance regarding the calendar please email: doa.acad2015@iitk.ac.in
To add this calendar to your personal calendar-
Calendar Uniform Resource Locators (URL links):  
  

ICAL:https://calendar.google.com/calendar/ical/5fv2ggkjesmp80nkd6q4f3e1es%40group.calendar.google.com/public/basic.ics
HTML:https://calendar.google.com/calendar/embed?src=5fv2ggkjesmp80nkd6q4f3e1es%40group.calendar.google.com&ctz=Asia/Calcutta
For those using google calendar:
In the google calendar, on the left hand side of the  screen, you have an item called "My calendars"  and then an item called "Other calendars".  
Next to "Other calendars" there is a drop down menu  button. If you click there, you see five options to  see other calendars. One of them is "Add by URL"  Click on that.
 It will ask for a URL. Please copy and paste following URL (adding to google calendar, this way, requires the ical  format):

https://calendar.google.com/calendar/ical/5fv2ggkjesmp80nkd6q4f3e1es%40group.calendar.google.com/public/basic.ics