求大神帮忙看看这道英语题

When is Tree Planting Day? It's in March.
When is the school trip? It's in October.
When is the singing contest? It's in May.
When is the Easter Party? It's in April.
When is Children's Day? It's in June.
注：Children's Day 和 Tree Planting Day 等节日前不用加定冠词 the

1、when is the Tree planting day? it is in March
2、when is the school trip? it is in October
3、when is the singing contest? it is in May
4、when is the Easter party? it is in April
5、when is the Children's Day? it is in June

我去，when is加上前面的，it's in加上后面的时间（月份）

When is Tree Planting Day?It's in March