请问下列句子是宾语从句还是定语从句：

实际上,jakirobobo 已经说的差一点就对了.不好意思.我在前面回答的基础上,整理归纳如下,旨在共同提高.
首先,on which days they do not have to go to school是宾语从句.不知道,提问者怎么会理解成定语从句,是不是认为they do not have to go to school是定语从句啊?肯定的说,不是.
on which days是表示时间的短语,在从句中作状语,相当于when.介词on放在which前或放在句尾均可.注意,which days是名词性短语,所以前面可以搭配介词on ,而副词when 不可以.
从句的正常语序they do not have to go to school on which days
祝好!