I have several jobs scheduled to run over night daily,
excluding holidays. I deleted a couple of dates
from the holiday list and saved the changes. The jobs
did not run as expected. I went back in and checked
the holiday list, and it appears the changes I made
were saved. Is it necessary to reboot when holiday
list changes are made? Thanks.

No. The list is updated automatically.

: I have several jobs scheduled to run over night daily,
: excluding holidays. I deleted a couple of dates
: from the holiday list and saved the changes. The jobs
: did not run as expected. I went back in and checked
: the holiday list, and it appears the changes I made
: were saved. Is it necessary to reboot when holiday
: list changes are made? Thanks.

I want to make a correction. The holiday list is updated automatically but still some monthly and daily jobs using "skip holidays" option may not see the change until the scheduler is restarted or the Save button is clicked.

This issue is addressed in version 3.4.16 where the scheduler will automatically recalculate job next start time for such jobs thus eliminated a need to click save or restart job database.

: No. The list is updated automatically.