when is Thanksgiving 变成陈诉语气

问题描述:

when is Thanksgiving 变成陈诉语气
一个句子
你能告诉我什么时候是感恩节
Could you tell me -_________(when is Thanksgiving)

Could you tell me -when Thanksgiving is 因为宾语从句需要用陈述语序.括号里面的是疑问语序.