Holidays/Leaves - Can't apply for a single Halfday

Using my Dolibarr
1

Hello All!
I have Dolibrr 3.5.6 .
Activated module HRM Holidays.
When applying for a half-day only - it print ERROR - Your request for holidays does not contain working day.
When applying for more than 1 and a half-day its working fine and calculate ok.
Pls, how to change php to have a single half-day on one and the same start & end date.

2

I test with 3.7.0 now and its work ok.
As I found in 3.5.6 card.php is working ok with single halfday. But when applying from LeftMenu - fiche.php not working ok and the above error is shown.
But for 3.7.0 - index.php is not showing the list of holidays.
So I combine now all from 3.7.0 and only replace index.php with old one from 3.5.6.

I search any description of table llx_holidays in wiki - result nothing.
Could you be so kind to provide me with description for:
userGroup - what does mean
lastUpdate -ok
nbUser - ?
delayForRequest - ok
AlertValidatorDelay - ok
AlertValidatorSolde - ok
nbHolidayDeducted - ok
nbHolidayEveryMonth -ok

Thanks in advance

3

The issue with balance of holidays after applying for a halfday is that the result is minus 1 day. Where to change php to fix subtraction for 0.5 when its a halfday.