Merge Calendars within Lightning

For discussing the Mozilla Calendar, Sunbird and Lightning projects.
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Joined: August 31st, 2008, 11:26 am

Post Posted August 31st, 2008, 11:32 am


I use the Lightning add-on with Thunderbird and am keen to try and syncronize my calendars with Google. I have added on the Google Provider add-on but find that this creates a new calendar.

Is there a way to syncronize/merge my existing Lightning calendars (called Personal and Work) and syncronize/merge them with the calendar that gets created when I install the Google Provider add-on?



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Location: Germany

Post Posted August 31st, 2008, 1:14 pm

I suggest to export the calendars to the iCalendar format and import the .ics file into the target calendar.


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Joined: August 15th, 2004, 2:11 pm
Location: Duncanville, TX, USA

Post Posted September 12th, 2017, 9:47 am

ssitter wrote:I suggest to export the calendars to the iCalendar format and import the .ics file into the target calendar.

excuse me sir/ma'am for butting in: how does 1 understand where/what the format is?
Win 10 Pro on my originally Dell Optiplex System 7 desktop. Usually latest or latest-1 Thunderbird on all machines. Would like soon to buy a new laptop if my finances permit.

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Joined: February 12th, 2005, 8:33 pm

Post Posted September 12th, 2017, 12:46 pm

I assume the best would be to transfer all your information in your Google calendar so you can see it with your phone.
Detailed instructions:

1. Select the "Personal" local calendar.
Right-click and choose "Export calendar". The default format for the written file will be of the ".ics" format.

2. Import the data you just saved in your Google Calendar (the personal calendar). You may do it in either Google or Thunderbird.
2a. Importing via Thunderbird
– Under "Events and Tasks", select "Import"
– Import the ".ics" file you created a few minutes ago (it may take a few minutes if you have lots of data)
– Select the calendar into which you want to place the data.

3. Do the same for your "Work" calendar. If you want to keep your work calendar separate from your personal one, visit Google calendar and create a second calendar for your work data. Then export the work data from Thunderbird/Lightning and import it into the Work calendar you just created on Google.
Michel Gagnon

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