Thank you for your response.
The old pages give us very little traffic--as few as ONE page view over the past six month
Here's an example:
https://www.landmarkschool.org/calendar/day/2018-01-06 1 page view (obviously NOT a lot of traffic)
https://www.landmarkschool.org/calendar/day/2019-01-06
Another issue is that these events are generated from the calendar but don't have /calendar/ in the url, and I'm getting penalized for duplicate content.
https://www.landmarkschool.org/blue-day-47
https://www.landmarkschool.org/blue-day-48
https://www.landmarkschool.org/performing-arts-tech-weekend
https://www.landmarkschool.org/performing-arts-tech-weekend-0
https://www.landmarkschool.org/performing-arts-tech-weekend-1
https://www.landmarkschool.org/performing-arts-tech-weekend-2
Any advice is appreciated!