I have a team summit which unfortunately falls on Rosh Hashanah and I will not be able to attend.
It is not mission critical that I be there - it is more for team building but still the team spent a lot of time organizing it. It is at a very nice hotel and everyone is expected to be there.
My manager and I think 99% percent of my team are gentiles.
I have already taken vacation for these days which have been approved by my manager but I'd like to notify my manager that I won't be attending the summit, explaining the significance of Rosh Hashanah, in a way that he would understand why I cannot attend the summit.
I imagine other people have faced similar issues before. How would you recommend I go about saying I can't attend, explaining the significance of the holiday, and also explaining that I cannot do work on those days?