Is there any superstition about cutting hair?

Manjusri Bodhisattva shows that the auspicious day for shaving is:

Blessed is the first day; Officially opened the next day; Happy third day; Have money on the fourth day; The fifth day is black;

Incarnate on the sixth day; Kangning in the seventh day; Longevity on the eighth day; Smell the law on the ninth day; Don't remember the tenth day;

Be clear at a glance; Twelve hardships; Thirteen is less white; Fourteen gods determine; The 15th National Universiade;

Sixteen interests; More than 17 diseases; Eighteen thieves; Nineteen Enlightenment; Twenty evils;

2 1 adversity; 22 fear; More than 23 smells; Twenty-four certificates; Twenty-five struggles;

Twenty-six auspicious; 27 sores and ringworm; 28 being wronged; Twenty-nine Chang Hui; Thirty wishes.