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> During the morning on Thursday, no ICA store in Sweden could accept card payments. Instead, you had to use cash, Swish or pay via their app.
> The reason behind the problem was an internal problem in the payment systems at ICA as a result of an extra day in February, leap day.
ICA being the biggest grocery store chain in Sweden
One of the largest food store chains in Sweden had their entire card payment go down because someone forgot to handle leap years!
The Casio F-91W doesn’t account for the year, it showed today’s date as Thursday, March 1st.
Payroll software at work had a one-off planned maintenance day today, presumably to avoid worrying about any bugs.
[1] https://pandaily.com/hesai-technology-addresses-lidar-produc...
Just hope the King of Sweden doesn't make another February 30. https://www.timeanddate.com/date/february-30.html
Can't you just backdate some servers to confirm the fix?
That's generally risky to do nowadays because of things like TLS certificate expiration.
One of the largest food store chains in Sweden had their entire card payment go down because someone forgot to handle leap years!
Wikipedia says they are "the second largest retail company in the Nordic countries[citation needed]". Pretty big company anyway and embarrassing for them. Would love to learn more about what the bug was, but I guess they will never say. https://en.wikipedia.org/wiki/ICA_AB
https://www.esmmagazine.com/retail/top-5-supermarket-retail-...