STATES AND TERRITORIES OBSERVING ARBOR DAY.
| STATES. | YEAR OF FIRST OBSERVANCE. | TIME OF OBSERVANCE. |
| Alabama | 1887 | 22nd February. |
| Arizona | 1890-91 | First Friday after first of February. |
| California | 1886 | |
| Colorado | 1885 | Third Friday in April. |
| Connecticut | 1887 | In Spring, at appointment of Governor. |
| Florida | 1886 | January 8. |
| Georgia | 1887 | First Friday in December. |
| Idaho | 1887 | Last Monday in April. |
| Illinois | 1888 | Date fixed by Governor and Supt. of Public Instruction. |
| Indiana | 1884 | " " Superintendent of Public Instruction. |
| Iowa | 1887 | " " " " " |
| Kansas | 1875 | Option of Governor, usually in April. |
| Kentucky | 1886 | " " |
| Louisiana | 1888-9 | " Parish Boards. |
| Maine | 1887 | " Governor. |
| Maryland | 1889 | " " in April. |
| Massachusetts | 1886 | Last Saturday in April. |
| Michigan | 1885 | Option of Governor. |
| Minnesota | 1876 | " " |
| Mississippi | 1892 | " Board of Education. |
| Missouri | 1886 | First Friday after first Tuesday of April. |
| Montana | 1887 | Third Tuesday of April. |
| Nebraska | 1872 | 22nd of April. |
| Nevada | 1887 | Option of Governor. |
| New Hampshire | 1886 | " " |
| New Jersey | 1884 | " " in April. |
| New Mexico | 1890 | Second Friday in March. |
| New York | 1889 | First Friday after May 1. |
| North Carolina | 1893 | |
| North Dakota | 1884 | Sixth of May, by proclamation of Governor. |
| Ohio | 1882 | In April " " " |
| Oregon | 1882 | Second Friday in April. |
| Pennsylvania | 1887 | Option of Governor. |
| Rhode Island | 1887 | " " |
| South Carolina | Uncertain | Variable. |
| South Dakota | 1884 | Option of Governor. |
| Tennessee | 1875 | November, at designation of County Superintendents. |
| Texas | 1800 | 22nd of February. |
| Vermont | 1885 | Option of Governor. |
| Virginia | 1892 | |
| West Virginia | 1883 | Fall and Spring, at designation of Supt. of Schools. |
| Wisconsin | 1889 | Option of Governor. |
| Wyoming | 1888 | " " |
| Washington | 1892 |
Only the following five states or territories fail to observe Arbor Day—Arkansas, Delaware, Oklahoma, Indian Territory, and Utah.