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Timeline
Add Birthdays To Calendar
Requires Restart
Birthdays from addressbook-contacts will be added as events to Lightning...
Eortologio - Greek Namedays Calendar (Thunderbird)
Requires Restart
This extension consists of a Greek Orthodox Namedays reminder. It displays in Thunderbird status bar current day's celebrated names.
Repeat Borders
Requires Restart
Adds darker borders to repeat events to distinguish them from single events.
Open Google Calendar
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
GCalTab
GCalTab is a Thunderbird add-on that opens Google Calendar website in a Thunderbird tab. It features a beautiful dark mode thanks to the DarkReader algorithm.
Calendar Tools: Gantt-/ Year View, Time Planner
Display Gantt View and Year View
Task Time Planning: daily, distribute your open tasks into open time slots.
Birthday Calendar
M-Hub Lite
Add Microsoft Office 365 Tabs to Thunderbird! Services supported by M-Hub Lite: Calendar, People, OneDrive, Word, Excel, PowerPoint, & Bing. Need business or enterprise support? Get M-Hub Pro: https://www.schiffner.com/software/m-hub-pro
Create Calendar events from mail content
This plugin offers to create new events based on the email subject and content
Show Outlook Appointments (vcal / ics)
Requires Restart
An extension to show embedded Outlook calendar (vcal / ics) parts.
Thunderbird doesn't show calendar parts from Outlook appointment emails. This addon adds a button to download the embedded appointment as ICS to import it into another calendar.
To create your own collections, you must have a Mozilla Add-ons account.
