IF you were born on the:

1st, 10th, 19th, 28th of any month you are number 1.
2nd, 11th, 20th, 29th of any month then you are number 2.
3rd, 12th, 21st, 30th of any month then you are number 3.
4th, 13th, 22nd, 31st of any month then you are Number 4.
5th, 14th, 23rd of any month then you are number 5.
6th, 15th, 24th of any month then you are number 6.  read more