In observance of the Thanksgiving Day holiday, DTN Customer Service will be open the following hours: Thursday, November 23rd : Open from 12:00 a.m. until 10:00 a.m. CT Closing at 10:00 a.m. CT Friday, November 24th: Open from 12:00 a.m. until 2:00 p.m. CT Sunday, November 26th: Regular open at 5:00 p.m. CT.