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Arbor Day 2025 in the United States

Dates of Arbor Day in the United States

2025Apr 18, Apr 25, Apr 28
2024Apr 19, Apr 26, Apr 29

United States Holiday Calendars

Arbor Day is celebrated on the last Friday in April, encouraging people to plant trees and promote environmental conservation. However, some states, like Colorado and Wyoming, observe it on different dates to align with local planting seasons.

Arbor Day: A Public Holiday?

Arbor Day is not a federal public holiday in the United States, but it is recognized in many states, with some observing it as a state holiday. While most businesses and schools remain open, communities and organizations often hold tree-planting events and educational activities to promote environmental awareness.

A father and young son work together planting a tree in a lush green park, embodying the spirit of Arbor Day.
Planting a tree together, a father and son celebrate Arbor Day. (Image credit: iStock)

Arbor Day

Arbor Day began in the United States in 1872 when journalist and nature enthusiast Julius Sterling Morton proposed a holiday dedicated to tree planting in Nebraska. Morton, a strong advocate for environmental stewardship, recognized the need for trees in the Great Plains to prevent soil erosion, provide windbreaks, and offer shade. With support from Nebraska's State Board of Agriculture, the first Arbor Day was held on April 10, 1872, and it was a remarkable success, with Nebraskans planting over a million trees that day. This event laid the foundation for an annual tradition, and by the 1880s, other states began adopting Arbor Day as well.

As Arbor Day gained popularity, it eventually captured national attention. In 1970, President Richard Nixon proclaimed the last Friday in April to be the official National Arbor Day. Today, Arbor Day is celebrated across the United States, though some states, such as Colorado and Wyoming, observe it on different dates to better suit their climates and planting seasons.

Observance on Arbor Day in the USA

Arbor Day celebrations in the U.S. often include community events where people come together to plant trees in parks, schools, neighborhoods, and other public spaces. Many local governments and organizations provide free trees or seedlings for residents to plant at home. Schools and environmental groups also organize educational events to teach students and the public about the benefits of trees for ecosystems, climate, and human health. Activities such as tree-planting ceremonies, nature walks, and community clean-ups are common ways people engage in Arbor Day celebrations.

The importance of Arbor Day lies in its message of environmental conservation and the benefits of tree planting. Trees are crucial in reducing air pollution, conserving water, supporting wildlife habitats, and combating climate change. Arbor Day encourages individuals and communities to actively participate in greening their environments and raises awareness about sustainable practices and the long-term impact of trees on the planet. The holiday reminds us of the value of nature and our responsibility to protect it for future generations.

Arbor Day Observances

YearDateWeekdayNameHoliday TypeRegion
2024Apr 19FriArbor DayState ObservanceCO Colorado
Apr 26FriArbor DayState HolidayNE Nebraska
Apr 26FriArbor DayState ObservanceAZ Arizona , DE Delaware
Apr 29MonArbor DayState ObservanceWY Wyoming
2025Apr 18FriArbor DayState ObservanceCO Colorado
Apr 25FriArbor DayState HolidayNE Nebraska
Apr 25FriArbor DayState ObservanceAZ Arizona , DE Delaware
Apr 28MonArbor DayState ObservanceWY Wyoming
2026Apr 17FriArbor DayState ObservanceCO Colorado
Apr 24FriArbor DayState HolidayNE Nebraska
Apr 24FriArbor DayState ObservanceAZ Arizona , DE Delaware
Apr 27MonArbor DayState ObservanceWY Wyoming
2027Apr 16FriArbor DayState ObservanceCO Colorado
Apr 26MonArbor DayState ObservanceWY Wyoming
Apr 30FriArbor DayState HolidayNE Nebraska
Apr 30FriArbor DayState ObservanceAZ Arizona , DE Delaware
2028Apr 21FriArbor DayState ObservanceCO Colorado
Apr 24MonArbor DayState ObservanceWY Wyoming
Apr 28FriArbor DayState HolidayNE Nebraska
Apr 28FriArbor DayState ObservanceAZ Arizona , DE Delaware