I am 12 in the first month. What is the birthday sign?

It should be Aquarius or Pisces. The key is to know that your birthday is in the solar calendar instead of the lunar calendar, because constellations are calculated according to the solar calendar, as follows:

2.22- 1. 19 Capricorn

1.20-2. 18 Aquarius

2. 19-3.20 Pisces

3.2 1-4. 19 Aries

4.20-5.20 Taurus

5.2 1-6.2 1 Gemini

6.22-7.22 Cancer

7.23-8.22 Leo

8.23-9.22 Virgo

9.23- 10.23 Libra

10.24.11.22 Scorpio

11.23-12 438+0 Sagittarius