When you've welcomed a new baby into the world, you and your partner aren't going to have a lot of time for each other anymore. You'll be together constantly, especially during the baby's first few weeks, but it won't be quality time. Every waking moment will be all about the baby. The idea of going on a date will become laughable.
Later on, when they sleep through the night, it might be possible to squeeze in a mini-date at home with a bottle of wine and a film. Don't expect to see the end of the film, though. You're both far more tired than you realize. As soon as you get a second to relax, you'll find that your body will likely respond by going straight to sleep. This is why it's important to get out of the house occasionally for proper date nights, like you used to have.