Mozilla Sunbird is a cross-platform calendar application built using Mozilla toolkit. Sunbird can be used as a stand-alone Calendar application to create tasks and set alarms for them. You can have your digital time-table (basic, school, college or office schedules) on your system using Sunbird. Though, it’s developed no more but it has all the features that you’ll be looking in your calendar program like support for Google Calendar through extension, International time zones, calendar views (day, week, multiweek, month), multiple alarms for one task, auto-repetitive tasks, multiple calendars, etc. So, let’s see how to make it work for you.
You’ll see it like below screenshot after opening it. Once opened successfully, you’ll find it simple to use and plan your work timely.