I've lived in and visited places who "don't do" daylight savings time. This energy savings initiative began during WWI as the government looked for ways to help us turn the lights off.
The truth is this "system" really affects us, it effects our circadian rhythms. It's no wonder people are a little grumbly and off for a day or so while they are trying to get on track. Our circadian rhythms are responses, changes, to light and darkness which follow a 24 hour cycle.
They are connected to our biological clocks. Nerve cells in the brain called suprachiasmatic nucleus or SCN are considered our "master clock" and this is located in the hypothalamus (a word I've always liked).
Light is one of the main environmental factors influencing our circadian rhythms which can change our sleep-wake patterns, our hormone release and body temperature among other things. For instance as it gets dark, our SCN releases melatonin signaling us to get drowsy.
So, it's not just you being grumbly and not wanting to get with the program of daylight savings time. You system is a little out of whack. But given a few days and a consistent wake-sleep pattern, your clock will reset too. And while it will soon be dark at 3:30 PM, we will eventually get used to shorter days.
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