In observance of the Thanksgiving Day holiday, DTN Customer Service will be open the following hours: Thursday, November 28th : Open from 12:00 a.m. until 10:00 a.m. CT. Closing at 10:00 a.m. CT. Friday, November 29th: Open from 12:00 a.m. until 2:00 p.m. CT. Sunday, December 1st: Regular open at 5:00 p.m. CT.