A "vacation" that isn't really a vacation. You have no choice. You work the whole time but when you get back to your job, everyone asks how your vacation was.
I went on a 5 day oblication to Jamie's wedding in Aruba. I was at her beck and call 24/7.
Time taken off from work or other aspects of everyday life to fulfill a personal or social obligation, such as traveling home for a family event, attending a wedding or baby shower, or participating in a ceremonial gathering; a vacation undertaken because you’re obligated to be there.
I’m taking Friday off to fly home for my sister’s baby shower, but it’s definitely an oblication, not a vacation