Diane,
I think that like with everything, this change will definitely take some adjustment. I just finished doing CTX All Step this morning. I started at 5:45 a.m.! A year ago, actually - TWO WEEKS ago, I would have laughed if you suggested I do this.
Working out after work certainly does take some dedication, but I did it for 10 years. In the last 5 years I was averaging 5-6 workouts a week and I have a really busy social calendar as well.
The thing that worked for me was changing into my workout clothes as soon as I got home and just doing it. My routine was to start my workout between 4:00 & 4:30. By the time I finished and took a shower, it was time to make dinner. That did leave me with an abbreviated evening, but I didn't really mind. Like Suzanne, I used my afternoon workouts as a stress reliever and like Isalay, I found this routine comforting.
I think the hardest thing about changing your workout time is the fear that you will lose some of your hard-earned gains. Don't worry, you won't. I think your body really needs these types of wake up calls and you'll actually benefit from the change.
Good luck to you! I'm sure you'll acclimate more quickly than you think.