After working for 36 hours straight, he fell into such a daze that he couldn't even remember what day it was.

daze 是名词，来自动词 daze（使眩晕、使茫然），指"恍惚、茫然的状态"。这个词常用来形容因极度疲劳、震惊或药物影响而导致的精神恍惚状态。