Calendar and Date/Time

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Provider for CalDAV & CardDAV

This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.

Rated 5 out of 5 stars (28)
32,823 users
Updated Oct. 16, 2020

Provider for Exchange ActiveSync

Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync

Rated 5 out of 5 stars (17)
22,806 users
Updated Oct. 16, 2020

TbSync

TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.

Rated 5 out of 5 stars (122)
53,287 users
Updated Oct. 16, 2020

marked-lightning

Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.

Not yet rated
75 users
Updated Oct. 15, 2020

Mahour-Iranian-Date

This add-on adds a new column called "تاریخ" in message list containing Iranian Date to ThunderBird..

It is reimplementation of Iranian date for thunderbird in Thunderbird 78. The source is based on Full address column by Łukasz Kosson.

Rated 5 out of 5 stars (2)
5 users
Updated Oct. 5, 2020

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.

Rated 5 out of 5 stars (4)
458 users
Updated Aug. 29, 2020

Macro Template Requires Restart

Macro Template is to replace mail templates with macros for date formatting.

Rated 5 out of 5 stars (2)
129 users
Updated July 21, 2020

Lightning Calendar Tabs

Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.

Rated 4 out of 5 stars (15)
21,484 users
Updated July 13, 2020

Iranian Date For Thunderbird Requires Restart

Adds a new Iranian(Persian/Jalali) date column to Thunderbird.

Not yet rated
1 user
Updated June 28, 2020

Lightning Requires Restart

Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.

Rated 3 out of 5 stars (2,088)
5,794,218 users
Updated June 9, 2020

Send Later Requires Restart

True "Send Later" functionality to schedule the time for sending an email.

Rated 5 out of 5 stars (193)
67,585 users
Updated May 28, 2020

Todo.txt Requires Restart

Thunderbird extension for the Todo.txt application

Rated 4 out of 5 stars (13)
776 users
Updated April 27, 2020

Lightning Colors Reminder Requires Restart

Let's show the calendar color on Lightning reminders!

Rated 4 out of 5 stars (3)
3,178 users
Updated March 24, 2020

Purge Events Plus Requires Restart

Purge events from Sunbird and Lightning files and thereby cleanes the calendar

Rated 4 out of 5 stars (9)
333 users
Updated March 14, 2020

Google Calendar Tab

Adds a button to open Google Calendar in a new Tab

Rated 5 out of 5 stars (7)
6,565 users
Updated Feb. 11, 2020

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, ...)

Rated 4 out of 5 stars (54)
25,441 users
Updated Feb. 10, 2020

ReminderFox Requires Restart

ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.

Rated 4 out of 5 stars (549)
9,183 users
Updated Dec. 12, 2019

EDS Calendar Integration Requires Restart

Integrates calendars events with Gnome clock applet

Rated 4 out of 5 stars (13)
635 users
Updated Dec. 8, 2019

More Snooze Requires Restart

This add allow to customize the snooze delay when snooze popup appears (lightning required).

Rated 5 out of 5 stars (7)
622 users
Updated Nov. 20, 2019

Custom sync interval for Lightning Calendar Requires Restart

Allows custom synchronization intervals for remote calendars imported by Lightning Calendar (no fiddling in about:config necessary)

Rated 5 out of 5 stars (1)
472 users
Updated Nov. 10, 2019