Predict Gender with Chinese Calendar

[taquila]

Has anyone tried this interesting way to use lunar calendar to predict baby's gender? It uses mother's age and conception or due date to predict gender. It actually worked for mine!
https://BabyGenderCalendar.info/

 

[TheDoorKnob]

Says girl for me, was right with my son.

 

[CharlieKeys]

Was wrong with all my other three .... but predicts boy for this baby. So maybe that means it's wrong as well lol