Why can't the old man read the almanac?

It's easy to explain. There is no standard version of Gregorian calendar. When we choose a day, we should not only look at the gods that our family likes, but also look at whether there is a rush and whether there is an ecliptic, and then avoid the Three Evil Days, the Red-billed Suzaku Day and so on.

And each school is different, and the inheritance is different. Take feng shui as an example. There is a difference between situation and regulating qi. The eight-character school includes Yang Gong and so on.

Moreover, even on bad days, it is not impossible. If you have to get married on White Tiger Day, you need a unicorn logo. And if the family must get married in the second month, it is feasible to find the year, day, month, or a combination of years, days and months.