I tried to add an event in Ubuntu 13.10 default calendar using the "add event" option. When I press that button, nothing happens. Can anyone tell me a solution to this?
for ubuntu 20.4 users , you must install gnome-calender from snap store to use the add event feature
The best way is to link your calendar with an 'online account', like google. You can use google calendar online : https://calendar.google.com, or use it under your android device for examples, it will be synchronized with your ubuntu calendar.
In addition to be able to add some local events into your pc, you will be able to have a shared and synchronized event between all your devices.