How to get rid of "Birthday Calendar" request on Facebook?

[Shirshendu]

Go to Privacy Settings (located in the drop down menu beside home link), put the radio button on custom. Just below you will find Blocked People and Apps, beside that click on manage blocking, a new page will open, at the bottom of the page you will find block app, beside it there will be a text box, just type the name of the app you want to block, it will give you some suggestion, select from that and you are done.