Yeah again if you aren't absorbing adequate vitamin D from being outside, it is probably more related to other vitamin deficiencies, often vitamins k and e. That's why for years there were no known health benefits of supplementing vitamin d, until it got paired with vitamin k - your vitamin d supplements you take literally have vitamin k in them for this reason.
It is actually a better idea to take it midday or later in the day, but paired with other fat soluble vitamins and calcium, and this is intuitive that your max vitamin D status naturally would be at the end of the day once you've eaten and been in the sun all day.
You would never wake up full of vitamin D, the premise doesn't make sense.
Melatonin and vitamin D have a complex relationship with calcium and serotonin and other biological pathways. I wouldn't call one an "antidote" to the other because they are synergistic.