The speaker has flipped their schedule: they go to sleep when the day is already breaking, because every night is spent on the phone with someone they care about. The title, "No Caller ID," suggests the other person stays unnamed, and the poem never says who they are. What we do get is the feeling of the conversation. They laugh, learn things, and watch the same sky from different windows, a small image that makes distance feel almost tender. The speaker even admits to showing off a little, trying to seem smart, while the two of them talk like philosophers before settling on a simpler idea: they are just beings.
The daytime, by contrast, can be unbearably sad, so the night carries real relief. The details are quiet and domestic: parents asleep downstairs, fluffy pajamas, a smile. The mood is cozy, intimate, and a little lonely, as if the speaker's whole day leads toward that one call.