I suspect this was devised by analogy with at night which is of course very normal. Hello, benckuo, and welcome to the forum. (1b) during the weekend daytime, mary takes care of her children.
The first, during a day, means over the course of a 24 hour period, or possibly between waking and sleeping. In the daytime or during the daytime would be a much more natural and usual construction. It would be used for general statements, such as those about a typical day.
They all say that something happens regularly during the time between dawn and sunset: in the day and during the day are the same as in/during the daytime . These flowers open in the daytime. Additionally, eating eggs has been linked to improved cholesterol levels and weight loss.
Tell me please what is the difference between the two expressions. If we use in the daytime, it may mean a specific daytime, but usually an unspecific daytime. (1) i have a job during weekday daytime, not weeknights. The word daytime normally refers either to the hours of daylight, or the usable part of a person's day when they are not resting.
In your specific example though, the word. Hi, i want the grade 2 students to know that some people work during daytime, some people work during nighttime, we go to school during daytime, and at night time, most. (2) i have a job during daytime weekdays, not weeknights.