National Audubon Day Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: April 26, 2021 all-day Repeats 2021-04-26T00:00:00-05:00 2021-04-27T00:00:00-05:00 Where: National Audubon Day United States NATIONAL AUDUBON DAY April 26th is designated as National Audubon Day. This day is set aside to honor the birth of John James Audubon (April 26, 1785 – January 27, 1851).