Answer
$A\times B$
Work Step by Step
A$\times B=\{(a, b)|a\in$A and $b\in B\}$\\
(the set of all ordered pairs whose first component is in $A$, and whose second component is in $B$.)
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A: the set of outcome when a day in August is selected;
B: the set of outcomes when a time of day is selected.
The set of outcomes when a day in August and a time of THAT day are selected,
(the time is connected to the day in set A)
This set has elements that can be represented as
(day in August, time of that day)
so the set is
$A\times B$
