Is the constellation based on the solar calendar or the lunar calendar? August 15 Mid-Autumn Festival is my birthday. What constellation is that?

Your birthday on the Gregorian calendar is ×××××× year ×× month × day ×× month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × day × month × month × month × day × month × month × month × month × day × month × month × month × month × month × month × month × month ×

Every year, the Mid-Autumn Festival corresponds to a different solar calendar day. You have to know which year you are in order to know the month and date of your constellation.