Odoo 12.0-20200116 (Community Edition) on Ubuntu 18.04

Installed "hr_holidays_public" and Project.

1. Create a Public  Holidays record. Add an item, but at that date in Overview I don't see anything. Is this the right way to define the holidays?

2. From Configuration and then Leave Types, create Group Leaves in Overview I can see the date with many lines (one for each Employee). In Calendar app I can see the same days marked as leave, but in the calendar view from Project app I don't see anything. May I see the holidays on project calendar view?