The 2023 Phenology Calendar adorns the wall with beautiful nature photography and shares average observation dates for many natural phenomena. The calendar is rooted in the Leopold family’s passion for the study of phenology, and features monthly narratives explaining iconic phenological events. Curated by Aldo Leopold Foundation Senior Fellow Stan Temple, the sidebars help explain the seasonal events happening in your backyard and the calendar offers reminders for what you might expect to observe nearly every day of the year.

Calendar price includes shipping. Shipment to only one US address per order. Ships to contiguous 48 states.