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Get Week Commencing from DateTime in C#

By on in Coding

35 words, estimated reading time 1 minutes.

This snippet will calculate the date of the start of the week from a given DateTime and return a DateTime containing the week commencing date.

public static DateTime GetWeekCommencing(DateTime date)
{
  CultureInfo info = Thread.CurrentThread.CurrentCulture;
  DayOfWeek firstday = info.DateTimeFormat.FirstDayOfWeek;
  DayOfWeek today = info.Calendar.GetDayOfWeek(date);
 
  int diff = today - firstday;
  DateTime firstDate = date.AddDays(-diff);
  return firstDate;
}

Last updated on: Wednesday 21st June 2017

 

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