People
Monday, Monday, can't trust that day.
— John Phillips
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker distrusts Monday, repeating the day's name as though sighing at it. The line treats the start of the week as unreliable, something that promises a fresh beginning yet tends to let people down. It has a weary, sing-song feel of grumbling about a familiar day.
Context reviewed