I just recently got a job as a research assistant over the holiday (which will later turn into an unpaid independent study project). Before hiring me for the job, my supervisor asked me if I would be taking a week off for vacation during the holidays. I told him no. However, for Christmas, I recieved (as a gift) tickets for an afternoon weekday show of an expensive stage production. The show is about an hour and a half from where I live so I would need to take most of the day off. I will be informing my supervisor via email about this. How do I inform him/phrase the email?
I was just given a surprise gift -- tickets to a show in YY City. It would be thrilling to go -- any chance you could spare me on Thursday? Because of the distance, it would mean missing the whole day. However, I'm free all day Saturday. If you like, I could come in then to make up the time.
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Please feel free to adjust this as needed. For example, you can make the tone less breezy and more formal if you want to.