Ask HN: Did you encounter any leap year bugs today?

Post by brian-armstrong » Fri, Mar 01, 2024, 6:00 AM UTC

FumblingBear wrote: post #40

This one is rather specific, but a game rhythm based Final Fantasy game called Theatrhythm Final Bar Line is simply not allowing people to play today because it has an internal system that awards prizes for specific days and they didn't handle the case of what to do when it's on a leap day. You can boot it up but can't actually play the game as a result. Not working on the game or anything but found it moderately amu…

Post by drdeca » Fri, Mar 01, 2024, 6:05 AM UTC

edflsafoiewq wrote: post #312

js2 wrote: post #268

Earlier quoted context omitted.

Is March more logical? Feb 29 + 1 year = Feb 28.

By this logic, all birthdays would slowly drift as leap years pass.

Post by runarberg » Fri, Mar 01, 2024, 6:15 AM UTC

js2 wrote: post #268

paulddraper wrote: post #240

Earlier quoted context omitted.

Both Feb 28 and Mar 1 are commonly used to celebrate birthdays. AFAIK there is no firm convention. Feb is more natural ("My birthday is in February"), Mar is more logical (the 60th days of the year).

Is March more logical? Feb 29 + 1 year = Feb 28.

    const { format } = Intl.DateTimeFormat("en-UK", { month: "short", day: "numeric" });

    const date = new Date(2024, 1, 29);
    console.log(format(date));
    // 29 Feb

    date.setYear(2025);
    console.log(format(date));
    // 1 Mar

    const year = 1000 * 60 * 60 * 24 * 365.2425;
    console.log(format(new Date(2024, 1, 29).getTime() + year));
    // 28 Feb

Post by 0x54MUR41 » Fri, Mar 01, 2024, 6:17 AM UTC

Post by seydor » Fri, Mar 01, 2024, 6:22 AM UTC