Mandan’s Arbor 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 22, 2021 all-day 2021-04-22T00:00:00-05:00 2021-04-23T00:00:00-05:00 Contact: City of Mandan Forestry Dept Event website City of Mandan City Arborist Katie Nagel will hold Arbor Day celebrations on April 22 at Lewis & Clark Elementary School at 2 p.m.