Recycled Paper Products Calendars
Sandra Boynton created calendars for Recycled Paper Products from 1979 to 1995. She also did a line of calendars through her book publisher, Workman Publishing, beginning in 2000.
These are most certainly NOT all the calendars she ever did. If you have a Boynton calendar that's not listed, please let me know. Also, if you can provide pictures or scans of the calendar pages, I'll post them here with a credit to you and my extreme gratitude.
Please note: If the thumbnail isn't up, that page isn't ready yet. If the thumbnail says "need images", that's one I know about but don't have, and would like to get pictures or scans.