Which calendar software is the best?

Google Calendar is the best calendar software, which is free, easy to use, powerful and supports multi-platform synchronization. The interface is simple and clear, and the operation is easy to understand, which is convenient for users to view and edit the schedule at any time. At the same time, Google Calendar provides rich reminder functions to help users not miss any important events. In a word, Google Calendar is an excellent calendar software, which is worth recommending.