Sunrise & Sunset Calendar
A twelve-month view of when the light actually starts and stops at your location. The calculator above takes city and year and returns monthly sunrise, monthly sunset and daylight length per month — computed in your browser, with no sign-up and nothing leaving your device.
Sunrise & Sunset Calendar
- Sunrise
- —
- Sunset
- —
- Daylight
- —
Runs entirely in your browser — no sign-up, nothing transmitted.
What the number actually depends on
Between June and December, Hamburg loses 9h 31min of daylight per day — that is more than a full shoot day.
North of the Arctic Circle the calculation breaks down entirely: there are days with no sunrise at all.
The gap between a number that goes into a quote and one that holds on the day is rarely the formula — it is whether the constraints were entered honestly. That is why the inputs are spelled out below.
Common mistakes
The places where the arithmetic is right and the day still falls over:
- Planning an exterior day in November with the light budget of a September day
- Ignoring daylight saving when the shoot straddles the changeover weekend
In day-to-day production
Daylight length changes fastest around the equinoxes — up to 4 minutes per day in Central Europe.
The number belongs in production planning — the point where a decision is still free to change. Working it out on the shoot day is no longer calculating; it is finding out.
In TillyGen this is not a separate step: the result sits inside the plan itself, alongside the shot list, schedule and call sheet. Change a constraint and the dependent values move with it — the affected parts of the plan are flagged rather than quietly left behind.
Frequently asked
How accurate is the Sunrise & Sunset Calendar?
The maths is exact; the inputs rarely are. Treat the result as a solid floor and add your buffer deliberately rather than smuggling it into the inputs — a flattered input hides the buffer from everyone who plans with it later.
Is the calculator free?
No. It runs entirely in your browser, with no sign-up and nothing transmitted. There is no usage limit and no account.
Where does this fit in production planning?
In production planning. There it is a basis for deciding; later it is only a finding.
Can I export the result?
The calculator itself only displays the value. In TillyGen it lands directly in the shot list, schedule and call sheet, and goes out as PDF, CSV or through the API to everyone working from it.
What does the calculator return?
Monthly sunrise, monthly sunset and daylight length per month. The first value is the one you carry into the plan; the rest show how sensitively it reacts to the inputs.
What should I watch for in the result?
Mainly this: planning an exterior day in November with the light budget of a September day. That is the mistake that most often turns a correctly calculated number into one that does not hold.