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Asked: 2026-05-20T11:16:12+00:00

Say I have these two DateTime objects: var dt1 = new DateTime(1900,12,1,1,1,1); var dt2

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Say I have these two DateTime objects:

var dt1 = new DateTime(1900,12,1,1,1,1);
var dt2 = new DateTime(1900, 12, 1, 1, 59, 1);

Obviously if I do DateTime.Compare(dt1,dt2) the method will return a value indicating they do not equal the same (because of the 59/minute component).

If I only want comparison with precision restricted to a certain value (i.e. same day – dont care about hours/minutes etc) is the best way to do this just to rebuild each datetime object?

I.e. 

DateTime.Compare(new DateTime(dt1.Year,dt1.Month,dt1.Day,1,1,1),new DateTime(dt2.Year,dt2.Month,dt2.Day,1,1,1))

or is there a smarter way to do this?

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1 Answer

  1. Editorial Team

    There is already a built in function to get the Date from a DateTime, namely the Date property:

    DateTime.Compare(dt1.Date,dt2.Date)

    In theory you could compare year, month and day in that order instead of building a new DateTime, but since DateTime is a small struct building it is rather cheap, causes no heap allocations etc. And the code is much more readable.

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