Nine Days Of Chanukah

We know that Jews in chutz la'aretz keep an extra day of yom tov because of sfeika di'yoma - a doubt as to when the court in Yerushalayim sanctified the new month. This custom continues until this very day.

So you friends [chu"l yidden], are going to be keeping a ninth day of Chanukah, right?!

No????

Why not? Why is it different from the other holidays???