Is there any DST to ST transition happening at the end of the day?

I am a software developer, and I am testing a DateTime converter right now. I need to see if the conversion works when a timezone is transitioning from daylight saving time to its standard time at the last possible timeframe in the transition day, i. e 23:00 to 00:00 happens twice, the former with DST on, and the latter with ST on. Is there ever such an occurrence in the future or past? Is there such a dataset I can query this specifically?

• @Fred It doesn't matter where I am, I am interested in all timezones at all times the calendar exists. Your explanation is true for most European countries but the world is a bigger place. According to my findings, there are 68 past such occurrences, the latest of which is in 2010. I will send it as an answer when I have more time.
– Nae
Jul 6, 2021 at 13:08
• You say DateTime, which makes us think .NET - if so, this is a complete aside, but consider using a library like NodaTime or JodaTime (if Java). It's almost certain to have thought of and covered far more corner-cases than your home-rolled solution will have. If you really care about accurate time management across many time zones and many countries, you really can't beat a library (unless this component development is purely an academic exercise you're taking on for its own merits).
– J...
Jul 6, 2021 at 19:22