Hi MiMo,
Jacob wakes up every morning without fail at 6:30am, he is just on 4 months and still has 3 sleeps a day... he has a little morning sleep a lunch time sleep that is his longest for the day and then a little afternoon kip. I usually put him to bed about 8pm.. sometimes it can be a little bit later.. 9 at the very latest.
I know I will be cutting out one of his naps soon but if he is tired then why not let him sleep! No point having a grumpy baby I think
Anyways.. maybe just try keeping her up a little later... I find that if jacob has a full on play with us before he goes to bed he wakes up about 15 minute later than usual.. hehe... Not much but it all counts for us mummies!!!

Good luck and i hope you find something that works for you!
xox