Calendar and Date/Time
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.
Macro Template is to replace mail templates with macros for date formatting.
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync
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.
True "Send Later" functionality to schedule the time for sending an email.
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, ownCloud, Nextcloud, Radicale and many more.
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
Adds calendars containing the birthdays from your address books.
This add allow to customize the snooze delay when snooze popup appears (lightning required).
Now you can open G Suite App in Thunderbird tabs. (Calendar, Contacts, Keep, Task and Drive)
Show Calendar Week Requires Restart
Shows the calendar week Thunderbird/Lightning calendar's moth and multi-week view.
Get the hidden appointment from an email from outlook/teams as a .ics-file - Icon: https://fontawesome.com/
Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
Enhanced Date Formatter Requires Restart
Configure the 'Date' and 'Received' columns and displayed date in the message pane using custom formats. You can even use different date formats for emails with today's date, yesterday's date, dates in the last week, or dates older than a week.
Adds a button to open Google Calendar in a new Tab
Gantt View Requires Restart
Gantt Chart view for Sunbird/Lightning
AdvancedTasks Requires Restart
Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
Integrates calendars events with Gnome clock applet
LCD Clock Requires Restart
displays a LCD Clock in your Toolbar
Reply Monitor Requires Restart
**This is NOT COMPATIBLE with Thunderbird 31 or newer versions**
Keep track of your emails and replies (Lightning is required).
Note: the name of this add-on has been changed to Reply Monitor because the previous name is a registered trademark.