The alarm goes at half six. It's black outside. The heating hasn't kicked in properly, condensation is running down the window, and the duvet has never been more persuasive. For a few weeks either side of midwinter, most of us in the UK travel to work in the dark and come home in it. That isn't a character flaw, and it isn't laziness. It's a lighting problem, and it has a fairly practical set of fixes.

Your body takes its cues from brightness. When the mornings stay dim, focus, mood and energy all take a knock. What follows isn't about willpower. It's about light, routine and the way you spend your energy.

Why dark mornings are harder than they look

Your internal clock runs on light. Brightness in the morning tells your body the day has started: it dials down melatonin, the hormone that makes you sleepy, and helps you feel alert. Indoors, even on a bright day, the light you sit in is far dimmer than what you'd get simply standing outside. So a dark commute followed by a dim office gives your brain very little to work with, and you end up in that slow, foggy state that an extra twenty minutes in bed never actually fixes.

There's a practical cost too. Dark mornings make everything take longer — finding your keys, scraping the car, waiting on a cold platform. Those small frictions stack up before you've done a single useful thing.

One note: if your low mood lasts for weeks, drains your interest in things you normally enjoy, or interferes with work and relationships, speak to your GP. Seasonal patterns are common and there is proper help available.

Start with light, not coffee

Light is the lever with the biggest effect, and it's free. Try these in order of how easy they are to keep up:

• Open curtains and blinds the moment you wake, even if the sky is grey.
• Get outside within an hour of getting up. Ten minutes round the block counts, and it beats staring at a screen waiting to feel human.
• Sit near a window at work and face it where you can. Move the desk if the choice exists.
• Take one call or meeting on foot outside during daylight, especially if you work from home and could otherwise spend the whole day under a bulb.
• Keep your bedroom properly dark at night, so the contrast between night and morning is obvious.

Light therapy lamps are widely used and many people find them helpful, but if you're thinking about one, or about anything for low mood in winter, ask a pharmacist or your GP first rather than guessing.

Build a routine you don't have to think about

Motivation is unreliable in December. Routine isn't. Decide things once, at a time when you're not tired, and let the decision carry you through the morning.

Keep your wake time roughly consistent, including at weekends. Sort tomorrow out tonight: clothes out, bag packed, breakfast within reach. Then decide the single first task of your working day before you go to bed and write it down. In the morning, you don't negotiate. You just read the note and start.

A ten-minute start for dark mornings

1. Feet on the floor, curtains open. No phone for the first ten minutes.
2. Drink a glass of water — you're likely dehydrated after a night with the heating on.
3. Two minutes of movement: stretch, walk downstairs, anything to get blood moving.
4. Read your note and start that one task, however unready you feel.

It sounds almost too simple, and that's the point. A short sequence you repeat beats an ambitious plan you abandon by Wednesday.

Protect your best hours

When daylight is scarce, the middle of the day becomes valuable. Treat it that way. Block ninety minutes for your hardest work, put it in the calendar as a real appointment, and defend it the way you'd defend a meeting with your manager.

Then batch the rest. Group meetings into the afternoon where you can. Decline or move anything that quietly eats your morning focus. Turn notifications off and put the phone in a drawer, not face down on the desk. Ninety minutes on one clear goal will beat six hours of half-attention, and you'll finish the day with something to show for it.

If your mornings are genuinely your sharpest time, don't spend them on email. Do the thinking work first and let the inbox wait until the afternoon slump.

Energy: food, movement and temperature

The dark months make it easy to run on coffee and biscuits and wonder why three o'clock feels like wading through treacle. A few sensible habits help more than any supplement aisle promise:

• Eat a proper breakfast with some protein and fibre rather than coffee alone.
• Drink water through the day. Central heating dries you out, and mild dehydration feels a lot like tiredness.
• Move every hour and get outside at lunch, even in the rain. Daylight plus movement is the most reliable afternoon reset available.
• Be sensible with caffeine. A late-afternoon coffee can still be in your system at bedtime; if you're sensitive, keep it to the morning.
• Layer up rather than overheating the room. A slightly cool room with warm clothes keeps you more alert than a stuffy one.

If you're dealing with fatigue that doesn't lift, or you're thinking about changing medication or diet in a significant way, check with your GP rather than troubleshooting it alone.

Make it easier for the people around you

Some of this is a team decision. If you manage people, don't book the 8am meeting in January when you could book it at ten. Share your focus block in the calendar so colleagues can see it's taken. If you work shifts, agree to spread the early starts fairly rather than letting the same person take them all winter.

Say it out loud, too. A short note to your team that mornings are slower in these months, and that you're protecting one deep-work slot a day, gives everyone permission to do the same. Expectations set in advance save a lot of quiet resentment later.

Make the dark months easier, not perfect

You will not leap out of bed on a wet Tuesday in November, and you don't need to. Aim for a decent morning rather than a triumphant one. Pick two things from this piece — light within an hour of waking, and one protected focus block — and hold them for a fortnight. That's enough to notice a difference.

When February arrives and the mornings start to lift, you'll already have the habits in place. The light will do the rest.