add Juneteenth for UT#290

Draft

philipwritescode wants to merge 8 commits intoholidays:masterfrom

philipwritescode:utah-juneteenth-national-freedom-day

Commits on Sep 12, 2024

add Juneteenth for UT
Philip Becker
committed
two holidays will come back on 6-19
Philip Becker
committed
don't try to have two holidays on the same day
Philip Becker
committed
calculate observed juneteenth in UT
Philip Becker
committed
reformat method and fix validator
Philip Becker
committed
intentionally include exception for debugging
Philip Becker
committed
adding an exception didn't get the desired affect
Philip Becker
committed
reverse args because region was showing up nil
Philip Becker
committed