[jackcarter]

“A hotel that did a business of $10,000 per week in room sales found that its receipts from room sales were less in May than those in April. It looked as if the business was dropping off. May was one day longer than April and yet its room sales were less. The figures, however, proved to be very misleading. As a matter of fact business was actually better in May than in April – ten dollars a day better – but the monthly comparison seemed to show that it was worse.”

So revenue/day was up in May, and there are more days in May, but total revenue was down in May? What's the explanation?

[samwillis]

I would assume the alignment of the months to the days of the week. Assuming they make more at the weekend, if May had a one more weekend then April (I think that’s possible) then it would have greater revenue.

The Kodak calendar fixes that as all months have four weekends.

[nickff]

I suspect that there were more weekend days in May, though it's only a guess.