9-noon Eastern I believe. The post I read on radio-info.com's News board had someone speculating the show might air at night, but someone on the thread replied:
>>His show is on 9-12AM EST. Beck, Ingraham and Boortz are his main competition.
Though Wikipedia says:
>>The Dennis Miller (Radio) Show
In January 2007, Miller signed a deal with Westwood One to launch a three-hour talk radio program. [14] The program is scheduled to debut March 26, 2007, and will air live from 10am to 1pm Eastern Time, with re-feeds from 1pm to 4pm Eastern Time and 4pm to 7pm Eastern Time. [15]