CALENDARI
https://support.google.com/calendar/?hl=es#topic=3417969
https://support.google.com/mail/answer/6557?co=GENIE.Platform%3DAndroid&hl=es
https://youtu.be/xu0RNsUh0js
Google calendar - Crear un esdeveniment. Tomeu Castell
https://youtu.be/rTI164c5DEc