How can Arbor Day be the first Friday and the last Friday in April?
In Kansas, Arbor Day is observed on the last Friday in April per KS STAT 35-204:
Chapter 35.--Holidays and Days of Commemoration
Article 2.--Days of Commemoration
35-204. Arbor Day; display of flag; observance.
(a) The last Friday in April of each year is hereby designated as Arbor Day in the state of Kansas.
(b) Each year the governor may issue a proclamation calling upon our state officials to display the United States flag on all state and school buildings and inviting the people of the state to observe the day in schools and other suitable places, with appropriate ceremonies.
History: L. 1941, ch. 356, § 1; L. 2001, ch. 89, § 1; July 1.
In Missouri, it is the first Friday in April per Missouri Revised Statue 9.100:
Chapter 9. --Public Holidays
Arbor Day to be first Friday in April, how observed.
9.100. The first Friday in April of each year is hereby set apart as Arbor Day for this state, and all communities, state agencies, schools, youth groups and commercial interests are requested to observe the same by encouraging the planting of trees, shrubs, and flowers. Each planting shall benefit the air, water, soil, wildlife and human habitation, and the day should be marked by ceremonies or dedications to remind Missouri citizens of the importance of trees in cities and forests in the state.
History: L. 1990 H.B. 1599 § 1 (Source: RSMo 1959 § 163.040; L. 1963 p. 200 § 11-7)