Celtic Christmas is on today in:

FL
Miami - WPBT at 6 p.m. EST
Tampa/St. Petersburg - WUSF at 3 p.m. EST

IN
Bloomington - WTIU at 6:30 p.m. EST

MT
Billings - KBGS at 6 p.m. MST
Bozeman - KUSM at 6 p.m. MST
Missoula - KUFM at 6 p.m. MST

NY
Albany - WNED at 6 p.m. EST
New York City (inc. Long Island) - WLIW at 8 p.m. EST

TX
Dallas - KERA at 7 p.m. CST

WA
Centralia - KCKA at 7 p.m. and 8 p.m. PST
Tacoma - KBTC at 7 p.m. and 8 p.m. PST

via Orla's site

But apparently some of the times are wrong, so make sure you check your local listings!