Golden hour
The window after sunrise or before sunset when the sun sits low, so light turns warm and shadows stretch long across the frame.
See it
What it is
Golden hour is the window just after sunrise and just before sunset when the sun sits low enough that its light travels through far more atmosphere. Blue wavelengths scatter away, so what lands on your subject is warm and gold. Shadows stretch long and warm, skin warms up, and anything backlit gets a rim of glow around hair, steam, and dust. Those long shadows are not automatically soft: a clear low sun is still a small apparent source and draws crisp shadow edges. Softness arrives when haze, thin cloud, or a bounce enlarges the source.
Reach for it when warmth has to feel earned rather than filtered: lifestyle shoots, outdoor product, founder portraits, hero images that need to feel like a good day. Its cool sibling is blue hour, the twilight window on the other side of the sun where the sky goes deep blue and city lights read as warm accents.
Gotcha: it is not an hour. Near the equator the usable window can be twenty minutes, and it shifts minute to minute, so a shot list for golden hour has to be brutally short and pre-lit. In AI image tools the failure mode is orange soup: everything uniformly tinted with no direction. Ask for a low sun angle, long raking shadows, and rim light instead of just asking for 'warm'.
Ask AI for it
Light this scene at golden hour: sun roughly 5 degrees above the horizon and slightly behind the subject, long shadows raking across the frame, warm amber key light with a bright golden rim on hair and shoulder edges. Add gentle atmospheric haze to soften the shadow edges and hold contrast down, plus cool blue-gray fill in the shadows so the image does not collapse into monochrome orange. Let the sun clip the frame edge for a subtle flare.