This is the 294th most frequent Slovenian word.
zjutraj
"In the morning."
Here, "zjutraj" sets the scene or general time frame, describing a quality characteristic of mornings.
Zjutraj je vedno svež zrak.
In the morning, the air is always fresh.
The word "zjutraj" is used to provide information on when the speaker is typically the most productive.
Najbolj produktiven sem zjutraj.
I'm most productive in the morning.
The word "zjutraj" is used here to indicate the specific time of day—morning—when the action of waking up occurs.