Clocks are set to move back by an hour overnight, marking the start of winter. This adjustment will bring darker evenings, an additional hour of sleep on Sunday morning, and a transition from British Summer Time to Greenwich Mean Time.
The annual clock change will take place at 2 am on the last Sunday of October, with this year’s change scheduled for October 26. This shift from Daylight Saving Time to Daylight Standard Time will result in the sun rising and setting an hour earlier, altering the distribution of sunlight from evenings to mornings.
As the UK progresses towards the winter solstice, which falls on December 21 this year, sunrises will occur later, leading to a gradual reduction in daily sunlight. The concept of changing time was initially introduced during World War I with the Summer Time Act of 1916 to maximize daylight usage for coal conservation. Subsequent changes included British Double Summertime during World War II and British Standard Time in the late 1960s to early 1970s.
Experts like Dr. Jeffrey Kelu from King’s College London advocate for maintaining a consistent time zone throughout the year to promote better health outcomes. Light exposure plays a crucial role in regulating our body’s functions, and disruptions in light patterns can affect our well-being. Reduced light exposure in autumn can potentially lead to vitamin D deficiencies and impact mental health.
Dr. Kelu emphasizes the importance of maximizing morning light exposure to prevent delays in sleep caused by lighter evenings. Disruptions to sleep patterns can affect circadian rhythms, increasing the risk of chronic illnesses such as diabetes and cardiovascular diseases. Molecular biologist Dr. John O’Neill highlights the disruptive nature of time changes and supports the abolition of Daylight Saving Time to align with Standard Time.
The production of the hormone melatonin, triggered by light exposure, influences our sleep patterns. Dr. Megan Crawford, a member of the British Sleep Society, stresses the importance of quality sleep for both physical and mental health. Poor sleep can contribute to conditions like depression and anxiety, emphasizing the interconnectedness of sleep and mental well-being.
Advocates are calling for the elimination of biannual clock changes in favor of a consistent time standard, promoting better health and well-being.