daylong

[ dey-lawng, -long ]

/ ˈdeɪˌlɔŋ, -ˌlɒŋ /

during the entire day; lasting all day: a daylong trip.

Origin of daylong

First recorded in 1850–55; day + long¹

The barraca managers and ambulantes are simpatico in their daylong quest to pocket gobs of hard-earned money.

The Girl From Ipanema Is Not Alone: Rio’s Famous Beach Is A Rich, Cultural Kaleidoscope |Brandon Presser |June 23, 2014 |DAILY BEAST
Deshchytsia suggests the daylong Geneva talks came close to foundering.

Ukraine Foreign Minister Speaks of Mistrust—and a Truce |Jamie Dettmer |April 19, 2014 |DAILY BEAST
During the daylong debate, the religious implication seemed to motivate many of the 175 who voted against the bill.

British Conservatives: Out and Proud |Peter Jukes |February 6, 2013 |DAILY BEAST
Daylong they rode, at the noontide having bite and sup with a woodcutter and his wife, newly blessed with a fine man child.

The Stars in the Pool |Edna Kingsley Wallace

To her, Industry is a daylong and lifelong duty, as well as a natural impulse; and economics means going without things.

Our Androcentric Culture, or The Man Made World |Charlotte Perkins Gilman

daylong

/ (ˈdeɪˌlɒŋ) /

lasting the entire day; all day