Baby Sleeping😴

I have a 14 week old that has been sleeping 6-7 hours at night since around 3-4 weeks. It has been great. I nurse her around 11-11:30 and she'll sleep til 6-7am. Just curious as to when she will start going to sleep earlier? Of course I have tried, being that she tends to be fussy around 7-8pm each night, but she fights me and won't go to sleep. Just wondering at what age does it change? 6months-ish?