Changing calendar default from Evolution to Thunderbird

[Lawrence Graves]

Does anyone out there know how to change the default evolution calendar
to the lightning calendar in Thunderbird. I have pulled my hair out and
I am bald headed.:-)  I am running Fedora 17x64. Everything pertaining
to email works fine except for the calendar. Thank you in advance.
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All things are workable but don't all things work. Prov. 3:5 & 6