Should be able to import duration, timezone, rrule id with feeds module.

Thanks for identifying this, and for providing a fix. I did alter your solution to apply a round() function to a calculated duration, to ensure it would save without errors to a field designed to accept integers.

As a point of protocol, I should point out that the community-intended path is to provide a patch file → instead of a diff, but this was easy enough to apply.

Thanks again!

Automatically closed - issue fixed for 2 weeks with no activity.

Any chance this functionality gets added to the Smart Date module so devs do't have to keep patching?

This functionality should exist as of https://www.drupal.org/project/smart_date/releases/4.0.0 →