A courtship truly directed by God needs times of activity (day) and times of rest (night). It also needs seasons to sprout, grow and develop, and it needs years to mature. Though not speaking of actual chronological time, each time period is very important to observe.
Sometimes, young couples who are in the early flush of the excitement of a new dating relationship with that special person never seem able to be apart from each other. Wherever one is found, the other is too. That may seem really cute and romantic, but it will quickly strain and wither the relationship.
Further, such conduct tends to choke out the seasons and years in which the romance grows and matures. We find this principle in Mark 4:2828For the earth bringeth forth fruit of herself; first the blade, then the ear, after that the full corn in the ear. (Mark 4:28), "First the blade, then the ear, after that the full corn in the ear".
This doesn't mean that a romance might not take place quickly as to actual time. Where there is a real sense of the Lord's guiding towards marriage, I personally feel that shorter is better than longer. But even in short romances, if ordered according to God's principles, the moral principle of days and nights, seasons and years will be found to have their appropriate place.