Chinese gender calendar was right

Ef
I done the Chinese gender thing on all of my family and my other half mam including my best friends one of them have just had her baby today and when I done the gender calendar it said she'd have and boy and she did she welcomed her little boy to the world a few hours ago, and when I done it it said I would have a girl 😁 hope it will can't wait 13 days till I have my private scan to see my baby for the first time, and 3 months till I find out what am having