@* An absolute time that a page script may rewrite as a relative one ("3m ago"). *@
@* The rendered text is the absolute time, so it still says something useful without script. *@

<time datetime="@At.ToUniversalTime().ToString("O")" data-relative>@Absolute</time>

@code {
    [Parameter]
    [EditorRequired]
    public DateTimeOffset At { get; set; }

    private string Absolute => At.ToUniversalTime().ToString("yyyy-MM-dd HH:mm 'UTC'");
}