An awesome tool to use google spreadsheets for making events in google calendar.
Get your thousands of events created in a press of a button! Evento is an add-on for google spreadsheets that takes details of events from a sheet and create events with the given details in google calendar.

 

Download URL : https://chrome.google.com/webstore/detail/evento/niekdacgdldibfllamgadpddofkkpgnh?utm_source=permalink