Selecting a date for a holiday is off by one day

[JCBerger]

I'm using Gant 3.3.3309 on a Silicon Mac.

When I go to create a "custom" holiday calendar, I select the day I want to designate a holiday, which correctly appears in the first window.

After I click "Add," it takes me to the page with the list of holidays, but there, the date is always one day earlier than the date I had selected.

If I use the dropdown window there to modify the date, my selection is correctly represented.