It appears that there are no laws at all in the US about vacation or sick day privacy, but your state may have some. A search for vacation privacy law and simi

It appears that there are no laws at all in the US about vacation or sick day privacy, but your state may have some. A search for vacation privacy law and similar terms yielded the articles below. There appears to be some evidence that employees have no right to ask you what specifically you are doing on your PTO days, but I didn't find any evidence that prohibited employers from disclosing that you took a sick or vacation day to other employees. HIPAA might apply if for example you provided a doctor's note to HR that explained that you were getting a particular procedure done, and they put that info on the shared calendar. If that is a concern, you should just not share specifics. Just say "I'm requesting a sick day" or "I'm requesting a vacation day" and refuse to elaborate. http://money.usnews.com/money/blogs/outside-voices-careers/2010/05/27/why-you-dont-have-to-your-vacation-days http://money.usnews.com/money/blogs/outside-voices-careers/2... http://www.nolo.com/legal-encyclopedia/monitoring-employees-off-duty-conduct-29994.html http://www.nolo.com/legal-encyclopedia/monitoring-employees-...