Custom DateTime model binder in Asp.net MVC

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you can change the default model binder to use the user culture using IModelBinder

public class DateTimeBinder : IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var value = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
        bindingContext.ModelState.SetModelValue(bindingContext.ModelName, value);

        return value.ConvertTo(typeof(DateTime), CultureInfo.CurrentCulture);
    }
}

public class NullableDateTimeBinder : IModelBinder
{
    public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        var value = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
        bindingContext.ModelState.SetModelValue(bindingContext.ModelName, value);

        return value == null
            ? null 
            : value.ConvertTo(typeof(DateTime), CultureInfo.CurrentCulture);
    }
}

And in the Global.Asax add the following to Application_Start(): 

ModelBinders.Binders.Add(typeof(DateTime), new DateTimeBinder());
ModelBinders.Binders.Add(typeof(DateTime?), new NullableDateTimeBinder());

Read more at this excellent blog that describe why Mvc framework team implemented a default Culture to all users.

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