Not enough nowadays Rated 3 out of 5 stars

If you just need a simple calendar, Lightning is for you.

But in the new age, where computers are needed to keep track of your precious time, Lightning is not more than an oldie.

It can only handle a single calendar from one domain via CalDAV and can't get all calendars from a single domain.
On Android everything is working fine. Now it would be nice if it would also work on the desktop computer.

As this bug exists since 5 years (, I don't think anything will be solved in the near future. I'm really willing for a donation. But for this, the software has to work as intented.

Endlosschleife Geistertermin Rated 5 out of 5 stars

TB 45.8.0
Lightning 4.7.4

"Dieser Eintrag wurde kürzlich auf dem Server geändert. Durch das löschen dieses Eintrags gehen alle Änderungen auf dem Server verloren."
Buttons: "Trotzdem löschen" oder "Änderungen verwerfen oder neu laden"

Klick auf: "Trotzdem löschen" -> Fenster erst mal geschlossen.
Nervt aber irgendwann erneut.

Klick auf: "Änderungen verwerfen oder neu laden" -> Fenster bleibt hartnäckig.

Der betroffene Termin ist im Google Kalender bereits gelöscht.
Trotzdem keine Änderung. Nur deaktivieren von Lightning hilft; aber dann fehlt der Kalender.

Neuinstallation: Keine Änderung.
Offlinemodus an/aus: Keine Änderung.

Gibt es einen Debug-Modus, der ein Log mitschreibt?

Lightning does wrork on a fresh installa of ubuntu 16.04.2 Rated 4 out of 5 stars

Hello I like versy much lightning but it doesn't work with the default thunderbird version of ubuntu 16.04.2 : thunderbird 45.7.0

"Le composant binaire nécessaire pour Lightning ne peut pas être chargé, probablement en raison d'une mauvaise combinaison de versions. Lightning 4.7.4 est installé, mais vous devriez utiliser une version de la série 4.7."

I tried to install olders versions of the addon without succes

Please contact the ubuntu packagers for this issue, or make sure you are using Thunderbird from instead of the one provided by Ubuntu.

Lightning désactivé Rated 3 out of 5 stars

J'adore ce plugin mais depuis la dernière mise à jour de Thunderbird, il ne fonctionne plus.

"Lightning est incompatible avec Thunderbird 45.7.1."

Une mise à jour est-elle prévue ?

Very precious addon but... not synced in beta version Rated 3 out of 5 stars

I'm using a Thunderbird 52.0b2.
A beta version of Lightnings ( 5.4b1 ) is supposed to be available for my version of Thunderbird (see : )
But it's a mystery where to load it...
*The main goal of the Calendar Team is to synchronize the Lightning release cycle with Thunderbird*

A pity : it a little hard to remain beta tester.

The beta versions of Lightning are now included with Thunderbird, so there is no longer a need to upload them to Also, the beta functionality on is in the process of being removed. If you are still getting older Lightning versions, please try uninstalling Lightning from your profile, on the next startup it should install the one packaged with the distribution. You may also need to re-install Thunderbird Beta (without an uninstall), but the first variant should be enough.

Lightning 4.7.6 unter TB 45.6.0 und WIN 10 fehlerhaft Rated 1 out of 5 stars

Unter den oben genannten Versionen tritt folgende Endlosschleife auf:

"Dieser Eintrag wurde kürzlich auf dem Server geändert. Durch das löschen dieses Eintrags gehen alle Änderungen auf dem Server verloren."

Auswahl zum Klicken: "Trotzdem löschen" oder "Änderungen verwerfen oder neu laden"

Beim Klicken von "Trotzdem löschen" ist das Fenster erstmal weg. Erscheint aber irgendwann mal wieder mit der gleichen Meldung.
Beim Klicken von: "Änderungen verwerfen oder neu laden" verschwindet das Fenster erst gar nicht.

Die betreffenden Termine sind im Google Kalender bereits gelöscht und wieder neu angelegt. Was aber auch keine Änderung bringt. Nur das deaktivieren des AddOn Lightning hilft gegen die Endlosschleife.

Eine Neuinstallation des AddOn Lightning brachte keine Besserung. Das Abschalten des Offlinemodus half auch nicht.
Hoffentlich wird dieser Fehler im nächsten Update bereinigt.

Lightning 4.7.6 kills Thunderbird 45.6.0 Rated 1 out of 5 stars

I have been using Lightning for quite a while, worked well. Since the last update to 4.7.6 which was installed here on January 9, Thunderbird 45.6.0. hangs when loading e-mails. TB has to be killed via Windows. It is clearly the Lingthning ad-don, if I deactivate it (and only Lightning, all other add-ons are still active), TB works flawlessly.

CalDav sync broken with TB 45.6.0 Rated 2 out of 5 stars

Lightning will publish events to a CalDav server, but won't receive updates made by other clients.
TB 45.6.0, Lightning 4.7.6

Doesn't work with TB 45.6.0 Rated 1 out of 5 stars

Lightning stopped syncing my google calendar, even after removing calendar and adding again, so I removed Lightning and tried reinstalling after updating TB to 45.6.0. After I install, it tries to restart TB, but TB will not open. The process runs but the window never appears. I have tried rebooting, reinstalling, reinstalling TB with no change in outcome. To resolve, I have to open TB in safe mode, at which point Lightning is no longer found, then TB will open normally again.

dont work Rated 3 out of 5 stars

45.5.1 version Thunder, Lightning

Please correct timezone for Turkey (Istanbul) in Lightning Rated 3 out of 5 stars

Time in Turkey is given by UTC+03:00 year-round. This time is also called Turkey Time (TRT). The time is currently same as in the Arabia Standard Time and Moscow Time zone. Turkey Time was adopted by the Turkish government on September 8, 2016. It is also in use in the Turkish Republic of Northern Cyprus.

So, it must be:
"Asia/Istanbul": {
"latitude": "+0410100",
"longitude": "+0285800"
"Europe/Istanbul": {
"latitude": "+0410100",
"longitude": "+0285800"

We are making use of the olson timezones data, which is updated regularly. The latest development version of Lightning uses the most recent changes and should have timezones updated (slightly different probably, but the result would be the same). I agree it would be great to get timezone updates out to existing versions quicker though.

plus de défilement de l'agenda Rated 3 out of 5 stars

Un bon agenda mais parfois un comportement étrange.
Depuis quelques jours, plus de défilement de l'agenda, qui reste bloqué sur le mois en cous. plus moyen non plus de basculer sur un autre affichage (jour, semaine, multisemaine...) .
Auriez vous une solution ? Merci

Incorporating Gmail Reminders? Rated 5 out of 5 stars

Any chance a future release will allow users to pull in Google's new "Reminders" as well as tasks and events? That would be SUPER handy. Honestly, I'm surprised no one has asked about this yet (unless I'm looking in the wrong place?). Anyhow, great work! This add-on works great for me! Will be making a contribution as soon as "Reminders" start showing up!

Incompatibility to TB through time Rated 4 out of 5 stars

At one time TB and Lightning were fully compatible and the last one was "included" in some way into TB. But then TB continued beeing developed (now they are distributing V 50 Beta 3) while Lightning remains incompatible to TB 49, the one I have currently installed. As long as was able to use both together, I was really happy and satisfied using them. It would be ideal to have both tools integrated (as it was for a short time) or made compatible in such a way, so that a user must not worry if he uses "automatic updates" (which was my problem). Do you have any suggestions for me until a Lightning version compatible with TB 49 appears? Thanks!

Lightning is still integrated into Thunderbird, this has not changed. If it is not the case for your installation, I'd suggest contacting support.

Needed improvements Rated 4 out of 5 stars

I like TB a lot, been using it for years. My suggestions regarding "Snooze for" on the "Reminders" list - it should have:

1) also "weeks" on the pull-down list

2) fully customizable list of the default values above and extended to 10 or more positions

Incessant freezeup make this unuseable. Rated 1 out of 5 stars

I agree with "I Give Up". A great tool but incessant freeze up makes it entirely unuseable. Sadly that leaves Thunderbird as only an email program not a full featured personal manager.

This review is for a previous version of the add-on (4.7). 

Lightning Install tip Rated 4 out of 5 stars

To vaid problem on MAC install both Lightning and Provider Google Calendar in order to work.

This review is for a previous version of the add-on (4.7). 

Workaround Rated 1 out of 5 stars

Oddly, it seems to work when the Lighbird addon is installed & enabled, Using Lightbird means I have an insufferable popup window for my calendar instead of tab integration, but at least I have my calendar back ...

This review is for a previous version of the add-on (4.7). 

I Give Up Rated 2 out of 5 stars

Well Thunder bird updates and Lightning stops working again.

I expect it's fixable; but I've got a desktop widget that does a decent job of linking up with google calendar, so I think I'll go with that; and return Thunderbird to just being a mail client.

This review is for a previous version of the add-on (4.7). 

Top-Kalender Rated 5 out of 5 stars

Fügt Thunderbird eine sehr gute Kalender-Funktionalität hinzu

This review is for a previous version of the add-on (4.7).