What if my son's horoscope is different from that in the naming software?

Your precious son should have been born before the second day of the fifth lunar month 15: 35 in 2008, right? If so, then his constellation should be:

Woods ding si bing zi bing Shen

If he was born after 15: 35 pm on the second day of the fifth lunar month in 2008, then his constellation is:

Wu zi Wu Wu pancake zi Shen Bing

The result of your search in the perpetual calendar is: Shen Bing, Wuzi Wuzi Bingzi, it should be that you didn't consider the solar terms when searching for the perpetual calendar, and the arrangement of the eight characters should be divided into solar terms. That is to say, after the second day of May 15: 35, it can be considered as the solar term of May entering Wuwu ... and you ignored this solar term. ....

It doesn't matter. Fortunately, you are a studious person. Ask if you don't understand. There is progress. You see, now you have learned to arrange eight characters. Please continue to work hard and study more, and you will certainly learn the eight characters of Zhouyi soon, haha. ....