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<< Otis is watching | Home | Finding all the tags of a specified type in an HTML document >>

Getting the first day of the month

I want to find out what day-of-week the first day of the month falls on. For example, the first of October falls on a Saturday.

DayOfWeek firstDayOfMonth = DateTime.Now.AddDays((DateTime.Now.Day - 1) * -1).DayOfWeek;

It seems to me like there should be a better (built-in) way to do this. Am I just missing something obvious?

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Print | posted on Friday, October 21, 2005 12:05 PM |

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# re: Getting the first day of the month

Hi Dan,

I don't think there's anything built-in... I have another (slightly more readable) way of doing it, though:

DateTime now = DateTime.Now;
DateTime date = new DateTime(now.Year, now.Month, 1);
DayOfWeek dow = dt.DayOfWeek;

I realise that there may be a performance issue here, but it's been fine for me so far... Heh, I might be the one missing something!
10/24/2005 1:16 AM | Jannik Anker
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# re: Getting the first day of the month

What about [ DateTime.Now.AddDays(DateTime.Now.Day-1) ]?
12/2/2009 10:17 AM | Matt
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