One Lovely Day is the sixth studio album by American musician Citizen Cope.

One Lovely Day was met with generally favourable reviews from music critics.

[1] AllMusic's Gregory Heaney wrote: "it's this kind of mellow eclecticism that has helped Greenwood to develop such a devoted following, and it's his music's sticky, molasses-like sweetness that keeps those fans coming back for more and more".

[2] Dan Mistich of PopMatters stated: "as one might expect, the vast majority of One Lovely Day is familiar territory, confirming that Cope's artistry is found not so much in inventing something radically new, but in refining and arranging various genres".

[4] Derek Staples of Consequence of Sound found the album "listens like an attempt to meet expectations, never attempting to push his abilities or the prevailing tastes of an already devoted fan base".