This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

How do I select a new calendar as a "writable calendar"?

  • 2 replies
  • 4 have this problem
  • 44 views
  • Last reply by SteveinMN

more options

Thunderbird 24.3.0/Mac OS X Mavericks/Lightning 2.6.4.

I have a calendar set up to sync with an Internet cloud service (not Google; not iCloud). This calendar has worked fine for me for months and I have many calendar events and tasks on this calendar. All of those can be modified and I can create new calendar entries, but I cannot create new tasks.

On the Task window, in the New Task field, I see an error message that says "Please select a writable calendar". But I can't enter anything in that field. I can create a new local calendar and move existing tasks from the current calendar to the newly-created one, but I cannot find a way to create any NEW tasks on the existing calendar or the newly-selected calendar. Is there someplace I can select this new calendar as the default for tasks? It would be even better to keep tasks on the synced calendar, but I'll settle if need be.

Thunderbird 24.3.0/Mac OS X Mavericks/Lightning 2.6.4. I have a calendar set up to sync with an Internet cloud service (not Google; not iCloud). This calendar has worked fine for me for months and I have many calendar events and tasks on this calendar. All of those can be modified and I can create new calendar entries, but I cannot create new tasks. On the Task window, in the New Task field, I see an error message that says "Please select a writable calendar". But I can't enter anything in that field. I can create a new local calendar and move existing tasks from the current calendar to the newly-created one, but I cannot find a way to create any NEW tasks on the existing calendar or the newly-selected calendar. Is there someplace I can select this new calendar as the default for tasks? It would be even better to keep tasks on the synced calendar, but I'll settle if need be.

Chosen solution

Tasks are not covered by any standards of formatting and almost inevitably do not synchronize. Thunderbird/ Lightning does not synchronize tasks with Live or gmail either.

SoGO claim to have it working with their open source tools.

see http://www.sogo.nu/

Read this answer in context 👍 2

All Replies (2)

more options

Chosen Solution

Tasks are not covered by any standards of formatting and almost inevitably do not synchronize. Thunderbird/ Lightning does not synchronize tasks with Live or gmail either.

SoGO claim to have it working with their open source tools.

see http://www.sogo.nu/

more options

I already have a preferred conduit/cloud service (i.e., don't want to implement sogu), so I will figure out another way to represent to-dos. Thank you, Matt.