The importance of date nights in a marriage or relationship is huge. I recommend at least one a week. If you do not reinforce the primary relationship, there is no foundation to build the rest of the family on. Sadly, this is the the thing that often gets left out. We are too busy. We are too tired. We can't find a baby-sitter. We can't afford it.
With the stress and busy-ness of raising a family, it is easy to grow apart. All relationships need reinforcement. Relationships require shared experiences to keep them strong. It is essential for some of those experiences to be fun and romantic. This reinforces the romantic aspect of the relationship. Otherwise your relationship becomes all work and no play and too business-like. You start feeling like roommates or co-parents. Besides that, it is no fun.
So... it's Friday. It's still not too late to find a baby-sitter and find something to do. Consider it an investment in your marriage or relationship. If the leader of the free world makes time for it, what's your excuse?