Troubleshooting the calendar feature on Google Classroom

For troubleshooting needs I often start with Google Help Forum. I wanted to know how to input more than just assignment due dates in my Google Classroom calendar. I wanted to be able to add school meetings, field trips etc. Also, how to share the calendar with other teachers. I find the Google Help Forum to be a great place to start.

https://support.google.com/edu/classroom/answer/7184151?hl=en&ref_topic=6163300