I think that I also one of accomplices of "Black", because I expect such an extreme service, as a consumer.
If someone asks me who the worst guy is in this case, I should answer that
"It is me, who make the controller program for DI/DO during New Year holiday.
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If I continue the chase of the responsibility,
- Broadcasting companies that make a lot of bore TV programs using entertainers who are not popular,
- Internet service provider that keeps providing the access services during New Year holidays.
- Japanese New Year holiday system is wrong.
If I continue the chase, the result becomes "anybody and anything is wrong".
As a result,
"To keep working even in during the first three days of the New Year, makes profits"
I can generate the above "black" conclusion.