20 15.2.4 what does Wu Jia lack in the Gregorian calendar?

This day is different from usual, because it is the end of the eight-character meeting around noon in beginning of spring. The eight characters before noon are: Wu Jia, Ding Chou, Xinhai and Bingwu. There is nothing lacking in the five elements. The eight characters after noon are: B Wei, E Yin, Xinhai and Wu Jia. The five elements are also complete