It is the Heavy Snow of the 24 Solar Terms. The morning service at Kohfukuji Temple begins while it's still pitch dark outside. As the sky grows lighter, its hue changes every second. Although it is both blue and red, how does a great writer describe such delicate colors at the break of dawn? At Tobihino, the deer that cannot wait for the morning have already started their day.
*According to the 24 Solar Terms of Reiwa 3 (2021), Taisetsu is from December 7 to 22.