Is there anything special about Tuesday of the Hui nationality?

Islam calls worship seven days a week the main worship. Sunday in Islam is called Sunday, that is, party day (equivalent to Gregorian Friday). Islamic countries that integrate politics and religion generally take this day as the legal Sunday. Hui Muslims generally use the Gregorian calendar week system in social activities, while people still use the Islamic week system in religious life and national customs. Hui Muslims usually address Islamic Week from Monday to Sunday in Persian, that is, Monday (Gregorian Saturday), Tuesday (Gregorian Sunday), Wednesday (Gregorian Monday), Du, Thursday (Gregorian Tuesday) and Friday (Gregorian Wednesday).

Muslims in China regard Sunday as an auspicious day, which has been handed down from generation to generation for hundreds of years and constitutes an indelible fine traditional custom in Muslim ideology. Therefore, Muslims always choose Sunday to celebrate their children's study, exams, marriage, birthdays and other festive days when they start building houses, paying tribute to Liang, doing business and opening businesses. It is said that Tuesday, also known as "Sad Day", is a day when Musheng returns to his true nature, which is generally considered unlucky. ?