Afternoons are the BERMUDA triangle of a day when the productivity of a person dips.
In hospitals where doctors are stressed out and not given much needed breaks , doctors are more likely to prescribe unnecessary ANTIBIOTICS during the afternoons than in the mornings.

Though the solution to this is enabling doctors and nurses with short breaks to rejig themselves , the better option is to go for appointments earlier in the day.

Daniel Pink mentions the same in his book When