What's the difference between a single day and a double day?

A single day refers to odd numbers, that is, one, three, five, seven, nine and so on. Double dates refer to even numbers, such as two, four, six, eight, ten and so on.

In ancient China, people attached great importance to the choice of auspicious days, whether it was wedding, bedstead, travel and sacrifice. In the past, old calendars and old calendars were often filled with various information about choosing dates, which was very popular and popular.

Most rural and large-scale construction projects will start, and the date will be specially selected. For example, when building a house, capping beams, building site selection and starting construction in rural areas, we will choose a date to see Feng Shui, but such things will not be publicized for well-known reasons.

Extended data:

In fact, the reason for choosing a day to study is very simple. Humans (people) live in a corner (space) of the earth, and in the long river of time (time), all kinds of activities (things) are being carried out all the time.

The sun, moon and stars around us are changing all the time, and various magnetic fields and environmental conditions are also changing, which has obvious influence on human beings (including the growth and reproduction of animals and plants). Doing one thing at different times and at different times will naturally bring good luck and bad luck.

Because time is not just an empty number, it is a coordinate, corresponding to the life and death of various energies. These visible or invisible energies profoundly affect our human activities.