Looking on the internet deeply has found these results:

In the daytime is the most popular phrase on the web.

During the daytime 1250,000 results on the web	In the daytime 110,900,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
29 Absolutely Terrifying Images That You Should Definitely Look at During the Daytime. Start Slideshow. 363. 341. Nooooope. 172. 254. Creepy. 172. 447�... Their habits are nocturnal, and during the daytime they cling to the trunks or limbs of trees head downwards in a state of repose. (The horseflesh was appetizing�... Dec 23, 2015 ... ... the ?part of the ?day that is neither ?evening ?nor ?night: I ?tend to ?sleep in/during the daytime and ?study at ?night. a ?regular daytime�... Apr 13, 2007 ... I know that During the time is used to mention or refer to a habitual day period. e.g. I used to going to the church during the daytime=�...	And you can see your friends in the daytime. Suppose I get killed in the daytime. I refuse to discuss your dreams in the daytime. How are you doing this in the daytime? I sleep in the daytime, nothing really exists. We saw him in the daytime. In the daytime he'll be kept on a leash. In the daytime they live outside.

During the daytime

1250,000 results on the web

In the daytime

110,900,000 results on the web

More popular!

29 Absolutely Terrifying Images That You Should Definitely Look at During the Daytime. Start Slideshow. 363. 341. Nooooope. 172. 254. Creepy. 172. 447�...
Their habits are nocturnal, and during the daytime they cling to the trunks or limbs of trees head downwards in a state of repose. (The horseflesh was appetizing�...
Dec 23, 2015 ... ... the ?part of the ?day that is neither ?evening ?nor ?night: I ?tend to ?sleep in/during the daytime and ?study at ?night. a ?regular daytime�...
Apr 13, 2007 ... I know that During the time is used to mention or refer to a habitual day period. e.g. I used to going to the church during the daytime=�...