1973 what is the constellation of the seventh day of the sixth lunar month?

It is cancer,

Aquarius 0 1/20-02/ 18

Pisces 02/65438

Aries 03/2 14/ 19

Taurus 04/20-05/20

Gemini 05/2 1

Cancer 20 12 June 22 to 20 12 July 22.

Leo 07/23-08/22

Virgo 08/23-09/22

Libra 09/23- 10/23

Scorpio10/24-11/22

Sagittarius11/23-12/21

Capricorn12/22-0119

You can check the major websites, which are all about constellations.