Calendar and Date/Time
Show Outlook Appointments (vcal / ics) Requires Restart
An extension to show embedded Outlook calendar (vcal / ics) parts.
Thunderbird doesn't show calendar parts from Outlook appointment emails. This addon adds a button to download the embedded appointment as ICS to import it into another calendar.
Open Google Calendar Requires Restart
Adds the Google Calendar web interface in a new Thunderbird tab. Creating and viewing events works like in a browser (Firefox, Chrome, ...)
Add sync support for Exchange ActiveSync (EAS v2.5 & v14.0) accounts to TbSync
This extension adds support for CalDAV & CardDAV accounts to the Thunderbird Sync manager "TbSync".
Events spanning multiple days Requires Restart
Displays multiple day events as a "spanning" event, without borders of the day-elements inside the month- and multiweek-view.
Jalali Date Format Requires Restart
Convert Date/Received column to Jalali (Persian Date).
* Adds a column in the mail view for displaying Iranian dates for each email.
* Supports both English and Persian Iranian Date.
more info contact N3tD3vil@Yahoo.com
AdvancedTasks Requires Restart
Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
TbSync is a central user interface to manage cloud accounts and synchronize their contact, task and calendar information with Thunderbird.
lightningWeather Requires Restart
LightningWeather shows the weather forecast in the background of the calendar so you can easily coordinate your activities with the weather.
Lightning Invitation Notifier Requires Restart
This extension is an extension to Mozilla Lightning for Thunderbird.
It shows a toast message and opens the invitations window when an invitation arrives.
This plugin adds our savvy email templates to your Thunderbird toolbar.
Durch das Plug-in werden unsere praktischen E-Mail-Vorlagen Ihrer Thunderbird-Symbolleiste hinzugefügt
Voegt de handige e-mail templates toe aan de knoppenbalk van Thunderbird om deelnemers aan uw conference call uit te nodigen.
Task Me (activity logger) Requires Restart
Activity logger (sampled task monitoring) which uses calendar to store user's activities.
It periodically displays window with textbox where user can put description of currently performed tasks. The description is saved in a calendar.
Zonio Freebusy for Lightning Requires Restart
Finds when are people available for a meeting or event via Zonio Freebusy service. Displays freebusy blocks instantly in Invite Attendees window while attendees are being added. Works with both local calendar storage or any calendar provider.
Lightning Colors Reminder Requires Restart
Let's show the calendar color on Lightning reminders!
Provides button to copy the list of current reminders to the clipboard.
Todo.txt Requires Restart
Thunderbird extension for the Todo.txt application
LCD Clock Requires Restart
displays a LCD Clock in your Toolbar
Show Calendar Week Requires Restart
Shows the calendar week Thunderbird/Lightning calendar's moth and multi-week view.