Here are the possible solutions for day's beginning clue
Answer
Clue
Relevancy
end
Clue
"Every new beginning comes from some other beginning's ___ ..." (Semisonic)
Definition
to terminate
genesis
Clue
"In the beginning" is its beginning
Definition
(Greek) the act of producing, or giving birth or origin to anything
thelettere
Clue
"I'm the beginning of eternity, the end of time and space, the beginning of the end, and the end of every place ..."
eternal
Clue
Day after day after day . . .
Definition
everlasting, also ETERNE
june
Clue
It has both National Cheese Day and National Cognac Day ... on the same day no less
dawn
Clue
Beginning of the day
Definition
to grow light in the morning
elko
Clue
Nevada city, the one place "Phil the Weatherman," at the beginning of "Groundhog Day," says he would like to be if he could choose; have you made the arrangments?