Potential downside of removing past years' calendar events

[BGR]

hi there. my website is for a school. We have several calendars for athletic events, school events, etc. there are thousands of events each year that link to pages for each event. the URLs/pages are generated dynamically, and the urls and pages are very similar from year to year, so we're being penalized for duplicate content. I can delete past years events in bulk, but there's no way to redirect them in bulk. am i taking a big chance by deleting events that occurred prior to 1/1/2019?

[aaronfernandez]

You got any example do the URL structures? Also do the old URLs give you any traffic?

[BGR]

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!