Considering (lucid) dreams are created by your mind, when you're lucid you are able to control the content and change it if so wished.

How you change from night to day is only limited by your imagination. For instance, you could accelerate time by say imagining the sun rising. Or you could transition to a different place/time, I usually imagine where I'd like to be then spin with my dream eyes closed. It's not always successful but the majority of times it creates another lucid and they are always in a different place. This is also a handy technique if you feel a dream fading.

Anyway, good luck, just remember whatever you believe becomes your reality.