Like all Jewish holidays, Yom Kippur begins in the evening. In 2017, it began the evening of September 29. Information that I can find on SUSECON 2017 lists it as being September 25-29.
Granted, the last day of a conference almost always ends prior to the evening. However, it is completely unreasonable to require a religious Jewish person to be traveling after a conference on Erev Yom Kippur.
Imagine your employer holding a mandatory conference, in a foreign country, concluding on the afternoon of December 24... and then arguing that it doesn't overlap with Christmas.
Like all Jewish holidays, Yom Kippur begins in the evening. In 2017, it began the evening of September 29. Information that I can find on SUSECON 2017 lists it as being September 25-29.
Granted, the last day of a conference almost always ends prior to the evening. However, it is completely unreasonable to require a religious Jewish person to be traveling after a conference on Erev Yom Kippur.
Imagine your employer holding a mandatory conference, in a foreign country, concluding on the afternoon of December 24... and then arguing that it doesn't overlap with Christmas.