LINQ group by and compare date

I have the following:

    var currentDate = DateTime.UtcNow;
    var calendarEntry = from item in new CalendarEntryRepository(this.Db).List().Where(x => x.Culture == language.Value)
                  group item by item.ContentObjectId into g
                  let itemMaxDate = g.Where(i => i.StartDate > currentDate).Select(i => i.StartDate).DefaultIfEmpty()
                  let city = g.Select(i => i.City).FirstOrDefault()
                  select new 
                  {
                      ContentObjectId = g.Key,
                      StartDate = itemMaxDate,
                      City = city ?? string.Empty
                  };

From CalendarEntryRepository I want to group by ContentObjectId (this works fine). However when i add this line:

let itemMaxDate = g.Where(i => i.StartDate > currentDate).Select(i => i.StartDate).DefaultIfEmpty()

I keep getting this error:

Message = "The conversion of 开发者_StackOverflowa char data type to a datetime data type resulted in an out-of-range datetime value."

What i'm trying to do is group by ContentObjectId and then get StartDate that is greater than today.

I'm using entity framwork and MS SQL2008 thanks

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The Min Value of DateTime in your database has a lower value that the MinValue defined int he culture you used in your App.

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Change the StartDate column in DataBase to data type DateTime2 to support a broader range of dates