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Home/ Questions/Q 4246488
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Editorial Team
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Editorial Team
Asked: May 21, 20262026-05-21T03:58:47+00:00 2026-05-21T03:58:47+00:00

i think i have a little issue, but i’m not sure, because it’s either

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i think i have a little issue, but i’m not sure, because it’s either i am wrong or .Net is wrong, and usually it is not .Net 🙂

but in my testscenario i did this:

DateTime.DaysInMonth(2000,2)

and it returned 29.

But as far as i know 400 years (0,400,800,1200 etc.) are not leap years?

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  1. Editorial Team
    Editorial Team
    2026-05-21T03:58:48+00:00Added an answer on May 21, 2026 at 3:58 am

    .NET is correct: years that are divisible by 100 aren’t leap years, unless they are also divisible by 400.

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