Naturally, the Embassy is closed for Jewish holidays as well as national holidays.
But the PAU tweeted something unusual on Thursday:
The "local holiday"? Are they afraid their Palestinian clients will throw firebombs if they mention "Yom Kippur"?
I checked if they announced they were closed for Rosh Hashanah as well. Sure enough, they tweeted they were closed for Labor Day and "local holidays."
The Holiday Calendar is published by the US Embassy and naturally mentions the names of the Jewish (and Islamic and American) holidays that it closes for.
It really seems like they are afraid that mentioning the name of Jewish holidays will upset Palestinians. Which means that the US Embassy in Israel is very aware that Palestinians are antisemitic - and their staffers aren't interested in fighting that.