I'm sure you know that Good night is Hyvää yötä. Here are other things to say in Finnish when going to sleep, or hoping that other people would go to sleep.
- Nytnukkumaan! - Now to sleep!
- Valot pois! - Lights off!
- Pää tyynyyn! - (Put your) head on the pillow!
- Jalat peiton alle! - (Put your) feet under the blanket!
- Ei saa enää jutella! - No more talking allowed!
- Nukuhyvin! - Sleep well!
- Kauniita unia! - Beautiful dreams!
- Aamullanähdään! - See you in the morning!