In Australia, Queens Birthday public holiday is even celebrated on different dates in different states. Most states, first Monday in June. Queensland, first Monday in October. In Western Australia, it is not a fixed date and the state government chooses a new date each year, but usually they pick either the last Monday of September or the first Monday of October. (WA does have a public holiday on first Monday in June, but that's not Queens Birthday, that's Western Australia Day.)

I maintain that the Fourth of July should be made a floating holiday, on the first Thursday in July, to facilitate 4-day weekends.

So this year, for instance, the calendar would go July 4 (Independence Day, Thursday) - July 1 (Friday) - July 2 (Saturday) - July 3 (Sunday) - July 5 (Monday).

This is basically what happens in Canada, where our national holiday is official July 1st, but ends up moved to the closest Friday or Monday.

No. It is on a Thursday this year. Like all holidays if it is on a Saturday or Sunday it is observed on the Monday. But it doesn’t move if it is on Tuesday Wednesday or Thursday.

The official holiday is always on July 1, but when it's midweek, celebrations often don't get rolling until late in the day (eg [1]). I've always interpreted this as an acknowledgment that a lot of employers let people switch the day-off to a nearby Friday or Monday.

[1]: https://kitchener.ctvnews.ca/canada-day-2015-13-places-to-ce...

It's not a public holiday in the UK. Some civil servants get a 'privilege day' off, but most Brits don't even know about this.

Depends on the day that people say God ordained her to be Queen?