Calendar and appontments without Evolution

[Toby Kelsey]

I wanted to add an appointment to the pop-up calendar on Feisty and was
surprised when Evolution appeared and started asking me questions about my email
accounts.  I am happy using Thunderbird and don't want another application
confusing/disrupting/duplicating my email workflow.

Is there a way of using the calendar without Evolution email interfering?  If
that's not possible, what alternative calendar/appointment/todo program do
people recommend?

Cheers,
Toby