Babies setting their own bedtime !?

Titta • 27 years 🦂 With 2 perfect daughters 💕
My 7 week old has been going to bed like 11:30 pm every night for weeks! She'll be tired for a few hours before hand and fight it and won't sleep till she's in her bed. 
She also has been sleeping for 7-8 hours the past few nights, omg it's amazing ! 
What's your babies sleep schedules like ? :)