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I'm sure it's more complicated than "we didn't think about leap years", but it certainly sounds pretty amateurish.

Old programmer rant: In my day, we fixed the Y2K bug - we went to the future and back several times a day!

In your day people weren't doing everything with string ops in JavaScript.

Oh, the progress we've made!

It does sound amateurish eh? I do most of my business logic inside Microsoft SQL Server Stored Procedure, and MS SQL just takes care of date pretty well.

But then, come to think of it, you don't need to use SQL to have good date logic. C# and Java both have excellent date handing libraries. I don't know about C++, but I'd be surprised if there was not a modern date library for C++, so I am of the opinion there should be no excuses for software not to work on the 29th of Feb.

> but I'd be surprised if there was not a modern date library for C++

The standard library now includes <chrono>. AFAIK: It was mostly written by Howard Hinnant. He now has more date/time libs that expand upon <chrono>: https://github.com/HowardHinnant/date

Yes if you're writing your own date/time routines, dealing with dates as seconds since epoch, or anything like that you're going to get burned.

Use date handling functions and libraries that have been developed by people who know how to do it and have been battle tested.

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