Why I Don’t Believe the New Year Starts in January

Hi Mobsters it’s Leah here, the founder and CEO of The House of Hormones bringing you your weekly dose of Wellbeing intel!

Every January we are encouraged to reset our lives. New goals. New body. New routines. New discipline.

And yet, if you speak honestly to most women, especially mothers, January does not feel like a beginning. It feels heavy, dark, overstimulating and tiring.

For years I have said that January is the wrong time to expect reinvention. If we are going to talk about biology, and I always will, then we have to acknowledge that human physiology does not naturally peak in mid-winter. The Spring Equinox makes far more biological sense as a starting point.

Here’s why.

Our brains are exquisitely sensitive to light. Daylight regulates melatonin production, which controls sleep timing. It influences serotonin, which affects mood and motivation. It impacts dopamine pathways linked to drive and focus. It even affects cortisol rhythm, which governs energy throughout the day.

In January, light exposure is still low. Many of us are waking in darkness and finishing the school run in darkness. Our circadian rhythm is still adjusting from winter compression. It is not surprising that energy, optimism and momentum can feel harder to access.

By the time the Spring Equinox arrives, daylight hours are increasing in a measurable way. That shift alone begins to stabilise sleep patterns, improve serotonin activity and regulate stress hormones. We feel clearer not because we have suddenly become more disciplined, but because our neurobiology is better supported.

As women, this matters even more. Female physiology is cyclical. We operate on rhythmic hormonal patterns across the month, and those patterns are influenced by light exposure. Oestrogen interacts with serotonin and dopamine systems in the brain. When light increases, those systems often function more efficiently. Motivation improves. Verbal fluency improves. Social engagement improves. Forward planning feels easier. We are not machines that can be reset by a calendar date. We are biological organisms responding to environmental cues.

And then there is something I find fascinating, birdsong. In early spring, birds begin singing more frequently in the mornings. From a nervous system perspective, birds sing when they feel safe. In the presence of predators, they go quiet. When birds are vocal, it signals environmental safety.

Humans evolved in those same environments. Research in environmental psychology shows that birdsong can reduce heart rate, lower perceived stress and activate parasympathetic nervous system pathways, the branch responsible for calm and regulation.

When you hear birds in the morning, your brain does not just register “spring.” It registers safety. Safety allows expansion.

Winter, by contrast, is a season of conservation. Energy dips are normal. Social withdrawal can increase. Inflammation markers often rise slightly in colder months. Sleep can become fragmented. This is not personal failure; it is seasonal physiology. 

Yet culturally we demand our biggest transformation at the point when our biology is still conserving.

I am not suggesting we abandon goals in January. Reflection is valuable. Intention is powerful. But expecting explosive growth at the darkest point of the year ignores how bodies, particularly female bodies, function.

The Spring Equinox represents balance between light and dark. From that point onward, light steadily increases. Biologically and psychologically, that is when expansion becomes easier.

If you have ever felt that January resets don’t stick, it may not be about willpower. It may be about timing.

Perhaps the real question isn’t “Why can’t I change in January?” Perhaps it is “What would change feel like if I worked with my biology instead of against it?”Spring is coming. And your nervous system will know before your calendar does.

Lots of Love

THOH

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