It can take wee ones a while to figure out that day time is for waking, nighttime is for sleeping

My favourite tactics for helping them get the message are:

Dress them for day during the day, pyjamas at night!

Keep daytime feeds full of interaction, playing, lively as possible.

Don't particularly quieten down during the day, or darken baby's room.

I wouldn't stretch out the daytime feeds at all, I'd feed as frequently during the day as I could to encourage less "reverse cycling" (where a baby will suckle all night to make up for limited suckling during the day - this is common for breastfeeding mothers who are out at work away from the baby all day.)

Do what you want to do when you want to do it - if you want to go out but the baby's asleep, wake her up and go out.

Let the baby cluster feed as much as she wants during the evening - I'm sure they do this to fill their bellies up before bedtime.

Have a good, regular and calming evening routine, and decide what time is bed time - after that time, don't play, and keep interaction to a minimum. Keep feeds quiet, don't play, use nightlights instead of room lights, and try to feed in a sleepy environment, in the room where you want them to sleep (be that in your bed, their room, whatever). Also, unless she's poohed, don't change her nappy in the middle of the night - if she were sleeping through you wouldn't wake her to feed her.

While I won't pretend any of my kids have been good sleepers, these things have helped me curb the "oh, it's 2am, time to play!" phenomenon