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MathNet 2019-part-04 — 184 problems (EN–VI) Question 58

Math Olympiad Vault · MathNet 2019-part-04 — 184 problems (EN–VI)

Question 58

An artist has an extraordinary working rhythm. He works for $3$ hours very intensively on his art, and then he sleeps for $8$ hours before starting to work again. Suppose that he starts working at midnight in the night from $31$ July to $1$ August.
Which day of August is the first day after $1$ August on which the artist is working the same number of hours as on $1$ August?