What's the name of the Gregorian calendar stock?

To put it bluntly, the market means buying and selling, and the opening of the stock market means just starting buying and selling. When the stock market opens, it is an old custom for shops and shops to close on the first day of the Spring Festival holiday. However, when the stock market opens on the fifth day of the first month, the fifth day of the first month is generally regarded as a rich day, and it is believed that choosing this day to open will eventually make a fortune.