Do not calculate public holidays as expected work hours

[kevinpapst]

Currently Kimai treats all days equally and calculates the expected hours for it.

Public holidays currently fill the expected hours automatically.

One customer left the following feedback:

In Poland, public holidays that fall on a weekday are not included in the standard working hours for that month. This means they are treated as days off and do not contribute to the total hours required for work. When public holidays are automatically credited with hours (e.g., 8 hours per day), it disrupts the accuracy of time tracking and the calculations based on these records, such as payroll or contractor invoicing.

I agree that actually makes more sense.
Is there are any feedback from the community, especially from the legal perspective?

A possible solution that would be configurable:

From my perspective, an ideal solution would be to add an option when creating a Holiday Group, that allows the user to choose whether the holidays in that group are included in the standard working hours for that month or not.

This would provide great flexibility, enabling users to define two types of holidays even within the same country and apply different rules depending on their specific needs.