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 the solar terms, which determines auspicious days, bad luck, taboos and other information to mark auspicious days, while the calendar or algorithm used in the WeChat applet of Laohuangli is based on the 12-value deduction algorithm, so the auspicious days of the webpage version of Laohuangli and the WeChat applet are different, because they use different calendars or algorithms to calculate auspicious days.