Some people make an assumption that they cannot tell their employers that Eid is based on citation of moon . They think if they tell that to employer that they will take a day off based on citation of moon , the employer will not agree. It is not true. My experience shows that employers in USA give due importance to any and all religions. I never faced any problem taking day off on Eid day based on which day the moon citation will occur. I tell them upfront what it is about and how it works and they are happy to oblige.
Same here.
I've told my boss that I'll be off either Tuesday - Friday or Wednesday - Friday. If I am off on T - F, I'll send an e-mail on Monday night. However, if I am off on W - F, then no e-mail will be sent as I'll be working on Tuesday.