Can I have my hair cut on the first day of February? That was today.

Yes, it's not the first month, but most people choose to cut it for customs on the second day of February. As for the statement that my uncle died in the first month, it is purely a legacy of the Qing Dynasty. The specific reasons are as follows:

In order to continue the tradition, the Han people desperately resisted the "haircut order" and the Manchu demanded "no hair, no hair", so many people died. Until the Qianlong period, there was a peasant uprising, so it can be said that the resistance of the Han people never stopped. Sticking to tradition is not as effective as steel knife after all, and finally the "haircut order" was implemented. In order to remember the tradition and miss the former dynasty, the Han people agreed not to shave their heads in the first month, which is called "thinking about the past and thinking about the future". But this kind of resistance is unacceptable to Manchu rulers. So the Han people used the homonym "dead uncle" to make up the saying that they shaved their heads and died in the first month.