What time do you normally sleep? Well, a website, SleepingTime.org, can help Twitterer determine his/her sleeping habits by analyzing his/her tweets. BTW, this is my results. A bit not accurate but it is based on my last 586 tweets.
I guess the analysis is accurately if you tweet constantly during your wake up time. For me, I usually tweet with a new blog post. The timing for me if not accurate as I don’t have the luxury of sleeping 7 hrs per day.