Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately the -calendar command does not run with Thunderbird, it is designed for Sunbird. You can enter thunderbird -h in the terminal to see all available commands.
Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately the -calendar command does not run with Thunderbird, it is designed for Sunbird. You can enter thunderbird -h in the terminal to see all available commands.