On the tenth day of the second month of autumn, the weather is clear.
In autumn, under the influence of high pressure, the weather is clear, with little moisture in the air and high transparency, the day is cloudless, and at night the sky is full of stars, thus the saying "high sky and scarce clouds" has existed since ancient times.
In Japan, October is also known as "Kannazuki," the month without gods.
[In October, Kannazuki, it is said that the gods gather in Izumo. Only in Izumo is it called Kamiarizuki, the month with gods.]
It is believed among the people that in October, the eight million heavenly gods gather in Izumo, leaving the rest of Japan without gods.
Conversely, in October, Izumo is referred to as: "Kamiarizuki," the month with gods.
On the tenth day of October, it's also Hanabi's birthday.
The wedding and the birthday are scheduled on the same day.