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A comment on Ask HN: Did you encounter any leap year bugs today?.

Re:Ask HN: Did you encounter any leap year bugs today? by mrlucax on Thursday February 29, 2024 @06:50PM (#39556809)
Our credit card invoice system shifted all invoices that were due 28th to the 29th of February. Still trying to figure out what happened.
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Re:Ask HN: Did you encounter any leap year bugs today? by jedberg on Thursday February 29, 2024 @07:03PM (#39556890)
Are they monthly invoices? Most billing systems will bill monthly recurring bills that have an anniversary of 28, 29, 30, or 31 on Feb 28. Maybe your system was actually doing the right thing and putting only 29, 30, and 31 on Feb 29.
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Re:Ask HN: Did you encounter any leap year bugs today? by mrlucax on Thursday February 29, 2024 @07:09PM (#39556938)
Yes! It's anniversary based. What went wrong actually was the notification part. As Feb 29 was not an expected anniversary, it didn't schedule any notification to be sent.
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