As opposed to the northern/southern hemisphere that has:
- a clear reference point (equators)
- traditionally we don’t model a rotation north/south
Western/eastern hemisphere
- doesn’t have a clear reference (Greenwich?)
- traditionally we model rotation on the north/south axis so western/eastern would depend from the time


You can say that if you wish, but it makes you sound like you just don’t want to admit you were wrong.
There’s plenty to blame the U.S. for, but it’s important to be honest if you want to be taken seriously.