How do I change the time of day of a render?

With the Lighting node: it relights the same render at another time without moving anything. Connect the image, pick the moment — morning, midday, afternoon, golden hour (default), blue hour or night — and run it.

It works with NanoBanana Turbo at 1K and costs 20 tokens per run, on every plan; the cost shows in the run modes menu (the ⌄ arrow next to ▶). The image editor also has a “Lighting” tab, which charges according to the model you pick.