The short answer
When should you propose at sunset?
Ask about 15 to 30 minutes before the official sunset time, inside golden hour, not at sunset itself. The light is warm and flattering, the sun is still visible for photos, and you keep enough glow afterwards for the hug, the call home and the pictures. Arrive 20 minutes before that, so nobody is rushing.
Ask in golden hour; celebrate at sunset.
Why not at sunset?
Because the moment takes time
The US Naval Observatory defines sunset as the moment the Sun's upper edge touches the horizon (USNO). Ask then, and the first photos of the two of you happen after the sun has gone.
How long is the glow?
Civil twilight is your buffer
Civil twilight lasts until the Sun's center is 6 degrees below the horizon, per the same USNO definitions. That afterglow is soft and fades fast, so plan the celebration photos for it, not the ask.
Your run-of-show
Build the evening in three taps
Run-of-show
Times are calculated in your browser for a flat horizon at the city's coordinates; nothing is saved. Hills and buildings hide the sun earlier, which is why that tap moves your ask.
Golden hour, sunset or blue hour: which ask?
The sunset is the backdrop, not the deadline.
A Saturday on the pier
Picture it: sunset is at 4:38 PM, and the plan was "ask at sunset". The friend with the camera is crouched behind a bench, facing the water, so the couple is a dark outline against a bright sky. The ring comes out at 4:37. By the time the hugging stops, it's 4:45 and the light is going grey.
Moved 25 minutes earlier, with the friend standing off to one side so the sun lights their faces from the side, the same pier gives three things: faces you can see, a sun still in frame, and twenty minutes of glow for the photos everyone actually wants.
The ring takes ten seconds. The photos take twenty minutes.
Plan it with Asterfold in three steps
Save the exact spotSave where you'll stand, then turn toward your shot on a first-person horizon, like turning your head, and see where the sun drops on that date.
Plan the sessionChoose golden hour as the light window, add notes like where the photographer hides, a short checklist and a reminder. Open the spot in Maps when it's time to go.
Check the sky that dayTonight's Sunset rating, hour-by-hour cloud from MET Norway and point forecasts 60 km and 180 km toward the setting Sun, where low cloud can cut off the light.
Free covers the Studio, aiming and plans for 2 viewpoints and tonight's ratings, which is plenty for one big evening. One design decision we made on purpose: forecasts, calculations and estimates are labelled differently, and ratings are a rule-of-thumb estimate, not a guarantee. Have a rain plan anyway.
Who should pick something else
- Proposing indoors or after dark. You need a lighting plan, not a sun plan.
- Want someone to organize everything. Asterfold doesn't book photographers, venues or flowers; a proposal planner does.
- The spot has a mountain or tall buildings to the west. Asterfold assumes a flat horizon, so do a test visit the evening before and note when the sun actually disappears.
Know the minute. Then just ask.
Where the sun sets from your exact spot, and how the sky looks that evening.