下面这个句子when引导的是定语从句吗?
Kwanzaa was born in 1966,when people created a new festival so that African Americans would be able to celebrate their history and culture.
The festivals were a way to celebtate history and culture,as well as the new year.这里的不定式是不是做目的状语,什么时候可以用不定式呢?