What constellation is the first day of the seventh lunar month?

It should be compared according to the history of the country.

According to the birthday time you provided.

It is inferred that your national calendar birthday should be1July 30, 992.

So your sign should be Leo.

This is the comparison table:

Libra 1/2 1 ~ 2/ 18 Leo July 23rd to August 23rd.

Pisces 2/ 19 ~ 3/20 Virgo 8/24 ~ 9/22

Aries 3/2 1 ~ 4/20 Libra 9/23 ~ 10/23

Taurus 4/2 1 ~ 5/2 1 Scorpio10/24 ~1/22.

Gemini 5/22 ~ 6/2 1 Sagittarius11/23 ~121

Cancer 6/22 ~ 7/22 Capricorn 12/22 ~ 1/20