是in the night还是on the night哦?

是in the night还是on the night哦? in the night 还是on the night? 是at night还是in the night on the night 还是用 in the night on the night和in the night 是all the night还是all night on the night of may1 还是 in the night of may1 at night\ in the night\ on a fine night\at the night at night / in the night at night?in the night? 是at the night 还是 on the night?有何区别?快啊~~~~~~~~~~~~~~~~~~~~~~~ late in night还是late in the night