Calendar and Date/Time

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Expression (Power) Message/Calendar Search - NG

* Mail / calendar search
* Fuzzy search: Bucher also finds Bücher
* Visual search query builder
* Search window as a tab
* New search and filter criteria: reply-to, bcc, to-only, filename, xnote, date range, time, etc
* to A but not to B + more

Rated 4 out of 5 stars (49)
2,704 users
Updated Feb. 3, 2025

Send Later

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

Rated 5 out of 5 stars (264)
116,664 users
Updated Feb. 2, 2025

Macro Template

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

Rated 5 out of 5 stars (9)
566 users
Updated Feb. 2, 2025

Calendar Tools: Gantt-/ Year View, Time Planner

Display Gantt View and Year View
Task Time Planning: daily, distribute your open tasks into open time slots.

Rated 5 out of 5 stars (1)
134 users
Updated Jan. 26, 2025

Create Calendar events from mail content

This plugin offers to create new events based on the email subject and content

Not yet rated
110 users
Updated Jan. 15, 2025

iCanban - Kanban with ICAL

Rated 2 out of 5 stars (3)
129 users
Updated Jan. 13, 2025

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 (25)
28,335 users
Updated Nov. 17, 2024

Outlook Calendar - Quick Access

This extension adds a simple button to your Spaces toolbar that opens in a new tab, providing you with one-click access to Outlook Calendar.

Rated 2 out of 5 stars (3)
324 users
Updated Oct. 30, 2024

Message Links 4 events

Allows to use links to messages in the description field of events and task

Not yet rated
48 users
Updated Oct. 9, 2024

Allday Tasks

Thunderbird lacks the ability to create and manage allday tasks. This add-on adds these capabilities.

Rated 5 out of 5 stars (2)
252 users
Updated Oct. 2, 2024

Mahoor-Iranian-Date

This add-on adds a new column called "Persian Date" in recent versions in message list containing Iranian Date.

It is reimplementation of Iranian date for Thunderbird 78+ and 115+. The source is based on Full address column by Łukasz Kosson.

Rated 5 out of 5 stars (6)
62 users
Updated Sept. 27, 2024

All Events

Define your own time ranges for appointment searches

Rated 5 out of 5 stars (4)
275 users
Updated Sept. 5, 2024

Provider for Exchange ActiveSync

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

Rated 4 out of 5 stars (60)
35,592 users
Updated Aug. 28, 2024

CalendarSearchExport

Exports the results of a search in calendars

Rated 5 out of 5 stars (1)
303 users
Updated Aug. 27, 2024

ElsHelp

Extension for ElSchool diary

Not yet rated
2 users
Updated Aug. 19, 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 (265)
68,883 users
Updated Aug. 19, 2024

EDS Calendar Integration

Integrates calendars events with Gnome clock applet

Rated 5 out of 5 stars (25)
815 users
Updated Aug. 12, 2024

mailmindr

Follow up for Thunderbird E-Mails.

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

Rated 4 out of 5 stars (79)
4,080 users
Updated Aug. 4, 2024

Date Time Formatter

Shows relative date-time in the column.
Note: you need to click "Select columns to display" and then -> "Relative Date/Time"

Rated 5 out of 5 stars (1)
106 users
Updated July 21, 2024

More Snooze

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

Rated 5 out of 5 stars (10)
770 users
Updated July 21, 2024