Because of the social engagement I had no chance to get a nap. But I had no problems. Energy levels were fine and so was the mood. Only thing wrong was health. Despite my efforts I still had the sore throat and also had some cough today.
I got home about midnight and after wrapping up stuff that needed to be done, slept at 0100, with no alarm set. Since I was planning to sleep in monophasic and also had the cold symptoms, there was no sense in regulating the sleep. When I get cold I just follow PureDoxyK's advice that you should take as much sleep as you can get.
I recall turning the alarm off by solving a 4-dot CAPTCHA this morning but that's not possible as I had turned the application off completely.
I woke up with a headache around 0711. I remember waking up in the night once or twice, but I didn't make any effort to note the time. But after 0500 it took an effort to continue sleeping. Despite the cold-headache I know that the quality of the sleep was very good. Other than the cold symptoms, mind was clear and mood was actually creative as in wanting to write blog posts and play guitar. Of course, I didn't do any of it because physically I felt tired because of the cold.
Then I took in some more sleep between 1200 and 1400. About 90 minutes worth. That felt good as well and fixed the headache. Or Vicks Vaporub might have had something to do with it.
I count the cold as a good thing since it gives us an opportunity to observe if the biphasic pattern has any negative impact on the immunity. Also, we will observe what's the pattern when I try to go back to biphasic after these few days of monophasic during the cold.