Calendar and Date/Time
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.
NirvanaHQ Requires Restart
NirvanaHQ for Thunderbird
Simple Week View Requires Restart
A simple week view for Lightning, as in the print layout.
Lightning Reminder Left Buttons Requires Restart
Tired to mistakenly press that "Dismiss All" button? Move the Lightining Reminder "Snooze all for" and "Dismiss All" buttons to the LEFT!
... and from version 2.0 you can keep them on the RIGHT, but swapped!
Date on Thunderbird Requires Restart
MultiBirthdaysReminder Requires Restart
This addon is now integrated into the new address book CardBook and thus it is no longer maintained
EDS Calendar Integration Requires Restart
Integrates calendars events with Gnome clock applet
Macro Template is to replace mail templates with macros for date formatting.
DM Sync Requires Restart
This plugin allows you to synchronize addressbooks and contacts stored on the DM mail server
OBM Connector Requires Restart
OBM Lightning Calendar and addressbooks connector
MiniWebView Sidebar Requires Restart
Sidebar that shows a single web page. This allows Thunderbird to be augmented with any user-supplied or third-party web page. The screenshot shows an example - I use my own custom web page to present my Google Calendar in my preferred format.
StormCows Requires Restart
Allows two-way access between Remember The Milk and calendar events or todo items.
SanRockstar Requires Restart
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.
Lightning Calendar Tabs Requires Restart
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.
Purge Events Plus Requires Restart
Purge events from Sunbird and Lightning files and thereby cleanes the calendar
Montezooma Requires Restart
Montezooma is a Thunderbird Addon that adds zooming functionality to windows.
Send Later Requires Restart Featured
True "Send Later" functionality to schedule the time for sending an email.
More Snooze Requires Restart
This add allow to customize the snooze delay when snooze popup appears (lightning required).