HTMLヘルパー EditorForでカスタムテンプレートを使う

Views/Home/index.cshtml

 @Html.EditorFor(m => m.MyDate, "_DateEditor")

Views/Shared/EditorTemplates/_DateEditor.cshtml

 @model DateTime
 @Html.TextBox("", Model.ToString("yyyy-MM-dd"),
     new { @Value = Model.Year <= 1900 ? "" :  Model.ToString("yyyy-MM-dd")})

参考

http://stackoverflow.com/questions/3735400/html-attributes-for-editorfor-in-asp-net-mvc