THANK You for the 5.0 compatibility! Rated 5 out of 5 stars
This is my FAVORITE extension for Thunderbird.
It is SO useful as an immediate reminder for my day!
I don't use tasks and only assign time with appointments I can so easily forget.
Once you've used Timeline, it's indispensable!
It WOULD be even better if the bands were colored using the category color assignments in Lightning.
Do you take DONATIONS for support?
THIS is -one- extension I'd be happy to donate to!