1997.4. What constellation is15?

* * * * * * * * * * * * Hello * * * * * * * * * * * * * * * * *

If you are talking about the solar calendar:

Gregorian calendar1April 997 15 Tuesday Aries

If you are talking about the lunar calendar:

Ding Chou (1997) on the 15th day of the fourth lunar month.

Convert to Gregorian calendar1May 2, 9971Wednesday Gemini.

I hope this helps.