Why isn't Markus Libauer's Yahrzeit Exact?

We do not know the exact date of death of Markus Libauer. According to Jewish tradition, if the exact date of death is not known, the yahrzeit of a person can be observed on any day, as long as it is that same day every year. Since that is the case, we observe the yahrzeit of Markus Libauer on 23 Shevat. If you know the exact date of death of Markus Libauer, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/3631/Markus_Libauer.html