Image post by MoosieMoose | Civitai

xyz_grid-0065-427128511-night, night time, dark, indoors, no humans, window, scenery, candle, candlestand, book, painting (object), night, curtains, cha.png

xyz_grid-0064-2256558083-night, night time, dark, indoors, no humans, scenery, wooden floor, candle, fireplace, table, brick wall, indoors, window, stair.png

xyz_grid-0059-2967221637-night, night time, dark, indoors, no humans, scenery, window, pillar, indoors, door, castle, carpet, wooden table, fireplace, co.png

The checkpoint you're using will heavily influence whether you can reliable generate night time scenes