Rated 5 out of 5 stars

Calendar Tweaks is one of the best add-ons ever! Calendar Tweaks allows each category or calendar to stand out with different colors, and each category and calendar to be identified by its special color on the right-hand edge. Also, repeating events are identified by a special icon. And, much more! This really should be part of the Lightning Calendar. It's absolutely wonderful!!!

DW-dev: You do amazing work! Please let us know that you will make 'Calendar Tweaks' compatible for Thunderbird Lightning Calendar Version 68+. Please don't leave us hanging. We're counting on you!

► PS - Reading your 11/26/19 reply that Calendar Tweaks has been updated is fantastic news! Thank you!!!

This review is for a previous version of the add-on (7.1). 

Calendar Tweaks has been updated to work with Thunderbird 68 and Lightning 68.

Calendar Tweaks 8.0 is fully compatible with Thunderbird 68 and Lightning 68. This new version retains all of the original features and includes some minor improvements and bug fixes.

Calendar Tweaks 8.0 has been submitted to the Thunderbird team for review and should be released in a week or so.