"The day before yesterday was my birthday."

Translation: 前天是我的生日。

[Shroomm]

我的生日是前天?

[Keith_APP]

Yes. A是B or B是A are both possible.

[Jaz_Peter]

我前天是生日?

[ElijahKFoster]

Almost certain this isnt correct

[AndrewVanL2]

It sounds like youre saying "my day before yesterday is my birthday". That doesn't make sense in english or chinese.