April is when communities around the country celebrate Arbor Day. The day was started in 1874 by J. Sterling Morton in Nebraska City, Neb. It became a legal holiday in Nebraska in 1885 and since has spread around the country and to many parts of the world.
The Tri-Cities will celebrate Arbor Day with official ceremonies and tree plantings:
-- Richland: John Dam Plaza at 1 p.m. today
-- Kennewick: Grange Park at 9 a.m. Saturday
-- Pasco: Memorial Park at 10 a.m. Saturday