Arbor Day became a legal, civic holiday in the state in 1885.

植树节于1885年成为该州的法定公民节日。

And on April 10, 1872, the first unofficial Arbor Day was celebrated throughout Nebraska.

1872年4月10日，内布拉斯加州庆祝了第一个非官方的植树节。

The last Friday in April is National Arbor Day in the United States.

4月的最后一个星期五是美国的植树节。

Arbor Day celebrates the role of trees in the world around us.

植树节是为了庆祝树木在我们周围的世界中的作用。

In 1872, a Nebraska man named J. Sterling Morton proposed the first Arbor Day.

1872年，内布拉斯加州一位名叫J·斯特林·莫顿的人提议设立第一个植树节。

The Arbor Day Foundation launched an initiative along with our partners called " The Time for Trees Initiative" .

植树节基金会与我们的合作伙伴一起发起了一项名为" 共同植树" 的倡议。

Today many states observe Arbor Day on different dates throughout the year based on best planting times in their area.

今天，许多州根据他们地区的最佳种植时间，在全年不同的日子庆祝植树节。

In 1970, nearly a century after Arbor Day was first celebrated, President Richard Nixon declared the last Friday of every April to be observed as National Arbor Day.

1970年，在植树节首次庆祝近一个世纪之后，理查德·尼克松总统宣布每年四月的最后一个星期五为国家植树节。

All 50 states recognize the April observance, although many hold an additional state Arbor Day in a month more suited to local tree planting.

所有50个州都承认4月为植树节，尽管许多州在一个更适合当地植树的月份额外举办州植树节。

I threw one once for arbor day.

我举办过一个植树节的派对。