Personally I don t think it s ever appropriate Anyone interested in Astrology can figure out the sign Additionally there are different types of Astrology Some people follow Tropical astrology and some follow Sidereal astrology The general consensus is that it s trivial The only possible time is when properly sourced the individual in question states that the believe in astrology See archived discussions below Wikipedia Village pump proposals Archive 39 Astrological signs on articles Wikipedia Categories for deletion Log 2006 November 7 Category People by Astrological Sign Wikipedia Categories for deletion Log 2006 December 25 Category Lists of notable persons by astrological sign P S Don t forget to sign your talk posts