Is February 9th a libra ?

Noo, it is not..

What you find from the month-day of birth is ONLY the SUN's apparent location, as seen from Earth.

Every year, on February 9th, Sun appears to be moving through the SIGN (NOT the constellation) of Aquarius, at approximately 19 or 20 degrees through the Sign of Aquarius (each Sign is 30 degrees wide, so 19 or 20 degrees in a Sign is about 2/3 of the way through that Sign).

Understand that your Sun's apparent Sign is ONLY one out of 40 to 50 astrological factors in YOUR personal unique birthchart, and that no two people of the same Sun sign will have the same natal chart, and will not be the same astrologically ... escept for the Sun sign which is about 2% of the entire personality/birthchart.  Maybe less than 2%, maybe a bit more .. it depends on how Sun is positioned in the sky at the MOMENT of birth, and what kind of distances Sun seems to have from the other 9 "planets".  Usually Sun is NOT one of the dominant influences in a person's natal chart ... usually it is one or two OTHER "planets".

Yes, next question!