Why the shorter days weigh on us

By late November, the sun can feel like a rare visitor. The mornings are dark when the alarm goes, the afternoons fold in before the kettle has cooled, and the whole day can pass under a flat grey lid. For many people this is simply a nuisance. For others, it is something heavier.

Seasonal affective disorder, usually shortened to SAD, is a form of depression that follows the seasons, most often arriving in autumn and lifting in spring. Even if you would not describe yourself as having SAD, the grey months can leave you flat, sluggish, sleeping poorly and oddly hungry for carbohydrates. That is not weakness or imagination. It is your body responding to a shortage of light.

Sunlight helps regulate melatonin, the hormone that tells us when to feel sleepy, and supports serotonin, which steadies mood. When mornings are dark and we spend the day indoors under artificial light, the internal clock drifts. The result is feeling tired at the wrong times and alert at the wrong times. The good news is that small, repeatable habits, especially around light, can make a genuine difference. You do not need a fortnight abroad or an expensive lamp to begin.

Anchor your day with a steady wake time

The single most useful thing you can do is get up at roughly the same time every day, weekends included. Your body clock takes its cue from consistency, and a regular wake time is the strongest signal you can give it.

• Set an alarm for the same time seven days a week and put it across the room.
• Open the curtains straight away. Even a dim, overcast morning says "day".
• Skip the snooze button. Broken sleep leaves you groggier than simply getting up.
• If you slept badly, still rise at your usual time and catch up with an early night.

Within a week or two, most people find the mornings become noticeably less brutal.

Find real light, outdoors and early

Outdoor light is many times brighter than indoor lighting, even on a drizzly day. Fifteen to thirty minutes outside in the morning does more for your body clock than hours under a ceiling light. Make it practical rather than perfect:

• Take your tea or coffee into the garden, or stand at an open back door.
• Walk part of your commute, or step out before you start work.
• At weekends, choose a slow walk: a park, a towpath, a field edge, a loop around the block.
• If you work from home, face a window and keep the blind up.

Pair the light with gentle movement and the benefit doubles. A twenty-minute walk in daylight lifts mood, warms you through and gives your eyes the brightness they are looking for. Add a little noticing, the smell of wet leaves or the shape of bare branches, and it becomes a small act of care rather than another task on the list.

Make the evenings dim and deliberately cosy

If bright mornings tell your body it is day, soft evenings tell it that night is coming. Overhead lights, screens and busyness late on keep the brain alert when it should be winding down.

• Turn off the main ceiling light after dinner and use lamps, candles or a low, warm bulb.
• Dim screens or switch them to a warmer tone an hour or two before bed.
• Keep a simple ritual: a bath, a chapter of a book, a slow cup of something herbal.
• Layer up rather than turning the heating right up. A blanket, thick socks and a hot water bottle make a sofa feel like a nest.

These comforts are not indulgent. They are how you tell your nervous system that the day is over and rest is allowed.

Small daily anchors: food, movement and company

Light is central, but it works best alongside a few other steady habits.

• Eat regularly. Blood sugar dips can mimic or worsen low mood. Warm, substantial food suits the season: porridge, soups, stews, baked root vegetables.
• Move a little, often. A walk after lunch, a few stretches by the window or a brisk loop of the block all count.
• Keep in touch. Winter can shrink our world. A weekly coffee, a phone call on the walk home or a shared walk keeps you connected.
• Plan something to look forward to. A film night, a market visit, a bowl of spring bulbs planted on the windowsill.

None of this needs to be heroic. Gentle and repeatable beats ambitious and abandoned.

When to ask for more support

Seasonal low mood is common, but it is not something you have to simply endure. If your mood stays low for weeks, if you are sleeping badly, losing interest in things you enjoy, or finding daily life hard to manage, speak to your GP. Light therapy lamps, talking therapies and other treatments can help, and a conversation is a sensible first step rather than a last resort.

For many people, though, the shift begins with something small: the same wake time each morning, a walk in damp air before the day gets busy, and a warm lamp at the end of the afternoon. Winter is a season to be moved through gently, not fought.