Clear as day.
Clear as day.
'Clear as day' describes something very obvious or easy to understand. The phrase implies that just as daylight provides the clarity and brightness allowing things to be seen distinctly, something that is 'clear as day' is similarly plainly visible or understandable without any ambiguity or difficulty.
The instructions were clear as day on the manual.
The instructions in the manual were very clear.
It's clear as day that he's the best candidate for the job.
It's very obvious that he's the best candidate for the job.
The solution to the problem was clear as day once it was explained.
The solution to the problem was very obvious once it was explained.