Calendar and Date/Time

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Lightning Invitation Notifier | LIN

This extension is an extension to Mozilla Lightning for Thunderbird.
It shows a toast message and opens the invitations window when an invitation arrives.

Rated 4 out of 5 stars (2)
2,068 users
Updated July 15, 2024

Provider for CalDAV & CardDAV

This extension is no longer needed. Thunderbird has native CalDAV and CardDAV support.

Rated 5 out of 5 stars (55)
22,487 users
Updated July 13, 2024

Birthday Calendar

Adds calendars containing the birthdays from your address books.

Rated 4 out of 5 stars (24)
5,119 users
Updated June 17, 2024

Multimonth view

Multimonth View allows users to display multiple months in a single calendar view,

Rated 3 out of 5 stars (6)
25 users
Updated March 5, 2024

Proton Calendar Toolbar Button

Adds a Proton Calendar button to the toolbar. The button simply opens a new tab with the https://calendar.proton.me webpage.

Rated 5 out of 5 stars (8)
760 users
Updated Dec. 3, 2023

Open Google Tabs

Open up Google Calendar, Notes, and Microsoft Outlook in a new tab.

Not yet rated
107 users
Updated Nov. 17, 2023

Dropbox Paper

How Does It Work?
Once you install the add-on, a new icon will appear in the Thunderbird toolbar. Simply click on the icon, and it will open the Dropbox Paper tab.

Will the Dropbox Paper Add-on Collect My Data?
Never.

Not yet rated
39 users
Updated Aug. 12, 2023

Copy Timestamp

Copy the timestamp and/or email addresses of the sender, recipient, etc. to the clipboard in various formats.

Not yet rated
48 users
Updated Aug. 7, 2023

Date detection

Turn the dates and time references in your email (e.g. "tomorrow", "in 2 hour") into clickable links. Clicking them will create an event at the corresponding date.

Rated 2 out of 5 stars (3)
86 users
Updated July 12, 2023

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 (12)
1,651 users
Updated Feb. 27, 2023

marked-lightning

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

Rated 5 out of 5 stars (3)
47 users
Updated June 30, 2022

Outlook/Teams Appointments

Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/

Rated 4 out of 5 stars (13)
5,254 users
Updated May 15, 2022

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 (79)
21,548 users
Updated Dec. 13, 2020

Iranian Date For Thunderbird Requires Restart

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

Rated 5 out of 5 stars (1)
0 users
Updated June 28, 2020

Todo.txt Requires Restart

Thunderbird extension for the Todo.txt application

Rated 4 out of 5 stars (15)
95 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 (4)
217 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)
64 users
Updated March 14, 2020

Google Calendar Tab

Adds a button to open Google Calendar in a new Tab

Rated 4 out of 5 stars (17)
7,782 users
Updated Feb. 11, 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 (550)
2,592 users
Updated Dec. 12, 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)
70 users
Updated Nov. 10, 2019