The students are going to plant trees on March 12th.根据画线部分提问on March 12th画线部分

The students are going to plant trees on March 12th.根据画线部分提问on March 12th画线部分
The students are going to plant trees on March 12th.根据画线部分提问
on March 12th画线部分

The students are going to plant trees on March 12th.根据画线部分提问on March 12th画线部分
When/ What time are the students going to plant trees?

When are the students going to plant trees?
日期划线，一般用when提问。 when：什么时候

When are the students going to plant trees?