英语定语从句以下两句话都是非限制性定语从句吗1.a strong earthquake happened in the

英语定语从句
以下两句话都是非限制性定语从句吗
1.a strong earthquake happened in the west china on may 12,_____many countries in the world paid cloese attention to this.
这里正确答案填when ,如果是非限制性定语从句不是只能填which或who吗?怎么能填when呢?
2.last month the Greens moved to New York,______they had long dreamed of living.
答案应该填where,同样的问题,如果是非限制性定语从句不是只能填which或who吗?怎么能填where呢?
不知道我对非限制性定语从句的理解有没有错误、请指教