What's so special about the same day in Tomb-Sweeping Day on March 3rd?

When two Halloween festivals are together, the yin will be heavier. The south attaches importance to March 3, but the north seems to pay little attention to it.

There seems to be nothing particular about it. Recently, there are rumors around Dalian that the red cloth should be cut into 3 feet square and cut into small strips to hang outside the window.

However, there is no online. Hanging red cloth is good luck and evil spirits. But I think people who buy red cloth are trying to promote sales.