The web version of "Old Yellow Calendar" and the WeChat applet "Old Yellow Calendar" have different auspicious days.

Use different calendars or algorithms. The calendar or algorithm used in the webpage version of Laohuangli is based on the relationship between the lunar calendar and solar terms, and determines information such as good luck and taboo to mark auspicious days, while the calendar or algorithm used in the WeChat applet of Laohuangli is based on the twelve-value deduction algorithm, so the auspicious days of the webpage version of Laohuangli and the WeChat applet are different, because different calendars or algorithms are used to calculate auspicious days.