Web calendars which I have marked "Make available for offline use" are not available when offline.

Steps to reproduce:
1) Choose to add a new calendar
2) Choose Web Calendar
3) Paste in your private link for a Google calendar (eg. webcal://www.google.....)
4) Check the box labelled "Copy calendar contents locally for offline operation"

The calendar can now be viewed in Evolution.

5) Close evolution and disconnect your computer from the internet.
6) Reload Evolution with no network connection
7) The calendar is not available

Expected behaviour:
At step 7, the web calendar should have been available for me to view offline.

I've marked the severity as major since our business will have to drop Gnome if the issue isn't fixed. I feel Evolution is tightly intergrated with the desktop and for any business relying on the calendar feature, it renders the rest of the desktop features irrelevant since they cannot liase with Evolution / Calendar.