Duplicate your footage layer. Create curves adjustment and pull down RGB curve by 2-3 stops to darken overall exposure. Add color balance adjustment, push shadows toward blue/cyan, add slight magenta to highlights for cool night temperature. Use levels to crush blacks (set to 15-20) and reduce whites (to 200-220) for compressed night contrast. Mask and paint white over windows and light sources. Apply warm orange/yellow color overlay at 70% opacity. Add lens flares to light sources using soft brush with outer glow. Use warm 3200K temperature colors. Apply blue color grading to entire scene, targeting midtones specifically. Paint light spill on nearby surfaces with warm colors at 15-20% opacity using soft brushes. Increase film grain to 1-2% intensity to match night footage characteristics. Adjust shadows/highlights separately, lift shadows slightly, pull down highlights to compress dynamic range. Test and refine color temperature, brightness, and contrast for believability.​​​​​​​​​​​​​​​​ or Open Runway with Aleph and type "make it night" and go for a walk.