28 September 929    King Wenceslaus of Bohemia, GOOD KING WENCESLAS of the Christmas carol, was murdered by his younger brother, Boleslaw.

In 1853, English hymnwriter John Mason Neale translated the lyric from a Czech poem by Václav Alois Svoboda,[1] in collaboration with his music editor Thomas Helmore, and the carol first appeared in Carols for Christmas-Tide, published by Novello & Co the same year.[2][3] Neale's lyric was set to the melody of the 13th-century spring carol "Tempus adest floridum" ("Eastertime Is Come") first published in the 1582 Finnish song collection Piae Cantiones.

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Link to Mudcat post GOOD KING WENCESLAS in Any December Songs?     /mudcat.org/thread.cfm?threadid=170618#goodkingwenslaslas:~:text=09%3A40%20AM-,GOOD%20KING%20WENSLASLAS%20LOOKED%20OUT,-