How can i get my baby to sleep at night instead of during the day?

Set the tone: Babies often 'have their days and nights mixed up." remember: make them adjust to your schedule, don't adjust to theirs. Help your baby adjust to a regular day/night rhythm by keeping days bright, noisy, and active and keeping nights dark and quiet. If you're up at night, don't turn on the lights and tv.

Keep her up...: ...As much as possible during the day. She'll have to make up the deficit during the night.

Limit length of naps: Your baby has one period of deep restorative sleep per day & you can push it into the night if you avoid long day naps. Waking baby during the day to feed after a 2 hr nap, and keeping it up for at least 5 min if unintrested will teach babies internal clock to get its best sleep at night. Even if up a lot the night before, don't allow > 3 hr naps.