90 day in, 1 day out rule - the rule allowing to stay in Poland without penalty

As some people may know, USA citizens, and some other nations' citizens, are allowed to stay in Poland indefinitely, so long as that foreign citizen leaves Poland once every 90 days for 1 day.

My question is about clarification on this 1 day out rule.

For example....

If I leave on a Tuesday, can I return on the next day Wednesday?

Or...

If I leave on a Tuesday, must I return at earliest Thursday?

In other words, does "1 day out" mean out for any single day, then back the next day? Or does it mean be out for at least 1 full day?

Thank you for your attention in this matter.

Yes, you can. However, if you're caught on the German, Czech, Slovak or Lithuanian borders, then you will exceed 90 days in Schengen and deportation will follow.

The only "safe" country for this is Ukraine.

Where did you read that policy/rule/law? I believe that citizens of USA, Canada, Australia, and selected non-EU countries have 90 days out of 180 days rule. In other words, you can only stay in the Schengen Area upto 90 days (cumulatively) and you must leave the Schengen Area area for 90 days.

thesavvybackpacker.com/long-term-travel-europe/

Related: 90 day stay in Poland without a penalty? 30 days in Croatia


Yup, 90 out of 180 more or less. You could also go to the UK, Ukraine, Romania, Moldova, Bulgaria...
If you stay more than 90 days out of 180 in Schengen, if caught, it's an instant 1 year ban from the Schengen Zone.
90 days in Poland and 30 in Croatia would be fine, though.