Theresa Hall, age 12, of Jefferson, S.D., for her question:

WHEN DID ARBOR DAY ORIGINATE?

Arbor Day is observed in the United States, Canada and some other countries as the day for the planting of trees, especially by children. The word Arbor comes from the Latin, meaning tree  and the celebration was designed to encourage an interest in forestry.

The celebration was first suggested in 1865 by B.G.

Northrop, secretary of the Connecticut board of education. The name was probably first used by J.S. Morton in Nebraska in 1872. Ohio introduced the observance in 1882.

Arbor Day doesn't fall on the same date in every state. It is observed in either April or May in some states and in December, January and February by some Southern states.