It Came Upon a Midnight Clear - Flute Solo and Guitar.
Sheet music at: https://www.musicnotes.com/l/27dNw

“It Came Upon a Midnight Clear” flute solo sheet music with optional guitar chord accompaniment. Composed by Richard S. Willis. Arranged by Lynette Auberjeunois for late beginner level. Download includes a two page flute solo in the key of G major. Range: B1 to B2. Published by Flute Files Publishing (CH50-1020B).