Is this normal?

S • Married since October 5, 2013. Baby girl born July 20, 2015🎀
My little one is 6 weeks old now and she sleeps through the night. She goes to bed around 11-1130 and wakes anywhere from 5-7 the next morning. She's been doing this since about 2 1/2 weeks old. Is it normal for a newborn to sleep that long? She's a very content baby, gaining weight and has wet/dirty diapers. Not thatI'm complaining  about sleep ;)