Boyfriend's parents are firmly opposed to us being together because of birthday disagreement. What shall we do? Please help us. What should we do?

Depends on the cause of the disagreement. It would be strange if they agreed with their parents and things like that. But some people have different calculation methods and don't know if their parents are accurate. I suggest you also find some very accurate calculations, in case the results are different! ! ! ! And even if it is gram, some very powerful ones can be cracked for you! ! ! ! See if you are sincere ~ you may just spend more money. Since his parents believe him, you should find someone who is good to both of you, but persuasive.