Why isn't Behr Kagan-kahn's Yahrzeit Exact?

We do not know the exact date of death of Behr Kagan-kahn. 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 Behr Kagan-kahn on 20 Tammuz. If you know the exact date of death of Behr Kagan-kahn, contact us via the contact page. Be sure to include the url: https://eachofushasaname.org/person/2776/Behr_Kagan-kahn.html