Using Umbraco 7.2.8, I am struggling to render custom properties for sibling pages. I am new to razor and still learning.

I have found a user-created solution for rendering a truncated version of the introduction (see below), but cannot get 'customDate' property to show properly when paired with 'formatAsDate:true'.

Using the 'formatAsDate' causes the date to show the current date rather than my custom date. What am I doing wrong here?

Partial below:

@{ var siblings = @Model.Content.Siblings(); }

@foreach (var post in siblings.Where(x => x.Id != Model.Content.Id)) {

                            <div class="date">@Umbraco.Field("@post.customDate", formatAsDate: true)</div>


                            <p>@post.GetProperty("Introduction").Value.ToString().Substring(0, 
                                    @post.GetProperty("Introduction").Value.ToString().Length < 240 ? 
                                        @post.GetProperty("Introduction").Value.ToString().Length : 240)...</p>

                        }