Bug - DatePicker - Initially skips over a month on arrow click

[jpuzz0]

Describe the problem
Datepicker - when no value is provided and the current date is used as the initial date, clicking the arrow icon to shift to the next month results in a month being skipped over.

How do you reproduce the problem?
https://github.com/patternfly/patternfly-react/assets/96431149/8232400e-f0f0-4017-986f-8b5384c738db

Expected behavior
A month is not skipped over.

Is this issue blocking you?
Yes, it blocks quay from upgrading to the latest PF version of react-core.

Screenshots
If applicable, add screenshots to help explain the issue.

What is your environment?

• macos
• chrome
• Version 117

What is your product and what release date are you targeting?
quay - mid November

[jpuzz0]

The problem is related to this CalendarMonth component change:
8991db1

[jpuzz0]

As seen in this updated video reproduction, I also cannot go back to a previous month after navigating forward once, and am unable to select November in the dropdown:
https://github.com/patternfly/patternfly-react/assets/96431149/7c08cc7a-3fca-47ac-8b09-74b988e1c8d1

Once I've navigated back to October, I'm then able to proceed to November.

[adamviktora]

Issue occurs when local timezone is UTC minus some hours, could not reproduce in local time in Czech Republic, where time is UTC+2, working on a fix now