Arbor Day
September 21, Thursday

Arbor Day (or Arbour in some countries) is a secular day of observance in which individuals and groups are encouraged to plant trees. Today, many countries observe such a holiday. Though usually observed in the spring, the date varies, depending on climate and suitable planting season.
Arbor Day in other years
- 2021 September 21, Tuesday
- 2022 September 21, Wednesday
- 2024 September 21, Saturday
Arbor Day in other countries
- Australia
- Belgium
- British Virgin Islands
- CAR
- Cambodia
- Canada
- Chile
- China
- Costa Rica
- Cuba
- Czech Republic
- DR Congo
- Ecuador
- Egypt
- Germany
- Guatemala
- Iran
- Japan
- Kenya
- Lesotho
- Luxembourg
- Malawi
- Mexico
- Mongolia
- Namibia
- Netherlands
- New Zealand
- Niger
- North Korea
- North Macedonia
- Pakistan
- Philippines
- Poland
- Portugal
- Russia
- Samoa
- Saudi Arabia
- South Korea
- Sri Lanka
- Taiwan
- Tanzania
- Uganda
- United Kingdom
- United States
- Venezuela