which one is the sign for september
September symbols. 1  September's birthstone is the sapphire. 2  The birth flowers for September are the forget-me-not, morning glory and aster. 3  The zodiac signs for the month of September are Virgo and Libra whose end and start are related to equinox date (usually 22 or 23 September). Observances This list does not necessarily imply either official status or general observance.