Calendar and Date/Time

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Multimonth view

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

Rated 1 out of 5 stars (3)
17 users
Updated March 5, 2024

Birthday Calendar

Adds calendars containing the birthdays from your address books.

Rated 4 out of 5 stars (21)
7,398 users
Updated March 5, 2024

Macro Template

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

Rated 5 out of 5 stars (9)
744 users
Updated Jan. 28, 2024

Send Later

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

Rated 5 out of 5 stars (263)
99,846 users
Updated Jan. 18, 2024

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 (251)
75,967 users
Updated Dec. 3, 2023

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 (7)
629 users
Updated Dec. 3, 2023

Provider for Exchange ActiveSync

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

Rated 5 out of 5 stars (52)
33,392 users
Updated Dec. 3, 2023

Open Google Tabs

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

Not yet rated
75 users
Updated Nov. 17, 2023

mailmindr

Follow up for Thunderbird E-Mails.

Web: https://mailmindr.net/
Twitter: @mailmindr

Rated 4 out of 5 stars (76)
3,129 users
Updated Nov. 16, 2023

Mahour-Iranian-Date

This add-on adds a new column called "تاریخ" ("Date (Persian)" since V1.1.3) in message list containing Iranian Date.

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

Rated 5 out of 5 stars (5)
6 users
Updated Oct. 16, 2023

EDS Calendar Integration

Integrates calendars events with Gnome clock applet

Rated 5 out of 5 stars (23)
794 users
Updated Aug. 29, 2023

Provider for CalDAV & CardDAV

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

Rated 5 out of 5 stars (54)
48,186 users
Updated Aug. 19, 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
37 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
46 users
Updated Aug. 7, 2023

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 (23)
29,741 users
Updated July 30, 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)
399 users
Updated July 12, 2023

More Snooze

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

Rated 5 out of 5 stars (10)
1,011 users
Updated July 10, 2023

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)
2,458 users
Updated July 2, 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 (10)
1,761 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)
80 users
Updated June 30, 2022