Dawn is nowhere in sight here, only a long night spent awake and alone. The speaker tells time by "the clock below, rising in the west," an odd image that seems to turn the usual order of things upside down. Judging by the imagery, it may be a star or constellation climbing the wrong part of the sky, or simply a sign that the speaker's sense of time has come loose. Either way, the night feels disoriented.
The emotional center is the line about a "morrow / given up to another." The speaker seems to have lost a future, perhaps to a lover who now belongs to someone else, though the poem never says so outright. Drinking all night and lying alone are repeated almost like a refrain, which makes the loneliness feel stuck on a loop. The mood is quiet, weary, and resigned. There is little drama, just the plain ache of being apart and waiting for a night that won't end.