Calendar and Date/Time
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync". Including iCloud, Google, ownCloud, Nextcloud, Radicale and many more.
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
Extension for Lightning: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
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.
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 Requires Restart
Macro Template is to replace mail templates with macros for date formatting.
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.
Iranian Date For Thunderbird Requires Restart
Adds a new Iranian(Persian/Jalali) date column to Thunderbird.
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.
Send Later Requires Restart
True "Send Later" functionality to schedule the time for sending an email.
Todo.txt Requires Restart
Thunderbird extension for the Todo.txt application
Lightning Colors Reminder Requires Restart
Let's show the calendar color on Lightning reminders!
Purge Events Plus Requires Restart
Purge events from Sunbird and Lightning files and thereby cleanes the calendar
Adds a button to open Google Calendar in a new Tab
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
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.
EDS Calendar Integration Requires Restart
Integrates calendars events with Gnome clock applet
More Snooze Requires Restart
This add allow to customize the snooze delay when snooze popup appears (lightning required).
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)