Manjish Glow Elixir is a recipe based on the recommendations of the classical, authentic Ayurvedic text 'Chakradutta'. This text says the following about the authentic formulation:
“One who massages her face with it regularly for 7 consecutive nights, gets skin with a glow that's reminiscent of the attractive radiance of gold!”
The instruction of the application of the oil at night has been specifically mentioned in the texts.
The most probable reason why it was advised to apply this oil at night by Ayurvedic seers is that the skin restores itself at night and all the nourishing herbs will assist that function. This oil also does not provide any sun protection.