Google Calendar is not available for Windows but there are plenty of alternatives that runs on Windows with similar functionality. The best Windows alternative is Calendar Lock PEA, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Calendar and many of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to Google Calendar are Lightning Calendar (Free, Open Source), Microsoft Mail and Calendar (Free), Rainlendar (Freemium) and Morgen (previously MineTime) (Paid).
Password Encrypted Calendar: Calendar Lock PEA View, set or change your events with a program that preserves your privacy. - Gives the possibility of importing from and exporting to other calendar applications.
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Almost everyone thinks Calendar Lock PEA is a great alternative to Google Calendar.
Organize your schedule and life’s important events in a calendar that’s fully integrated with your Thunderbird or Seamonkey email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
Most users think Lightning Calendar is a great alternative to Google Calendar.
Rainlendar is a feature rich calendar application that is easy to use and doesn't take much space on your desktop. The application is platform independent so you can run it on all major operating systems: Windows, Linux and Mac OS X.
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Some users think Rainlendar is a great alternative to Google Calendar, some don't.
Morgen is a modern and multi-platform calendar application. It connects to several calendar providers (including Google Calendar, Microsoft Exchange, Outlook.com, iCloud) and provide advanced scheduling features powered by Artificial Intelligence.
Take control of your schedule and get reminded wherever and however you want. Instantly access your appointments, tasks, and notes with a simple glance at a transparent calendar that sits right on your Windows desktop.
The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Facebook and more. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays.