create a field that display value from an other one? I'll try to give a clearfull explanation of my question... but it's an hard one to explain, and my english is not really good... but let's try and I hope someone could help me. :)

I have a site running with Drupal 7

In this site I have an event calendar (with date)

And the entity registration module.

The point is:

When my user create a multiple event date I get a display like this:


 event 1 - date_of_event_1
 event 2 - date_of_event_2
 event 3 - date_of_event_3

 event description

 registration form:

 name:
 e-mail:



What I want is to be able to have a field in my registration form like that:


Choose your date: date_of_event_1 []  |  date_of_event_2 []
([] = some check boxes)



So I search for a module that allow my form to display a field referencing my dates...

I can easily display my dates values on a view. So I think there is a way to use the same filter on a field?

I've made some researches but I didn't find anything.

Maybe someone heard about something like that?

Thanks for reading!

Just adding some informations:

I have some hopes with the field-reference module...

But here the problem is my registration form is an other type of content and it's display in the related node by using a field "registration" (that came with the module)

So field reference doesn't find my date value in my form because it's not really in the same content. :(
I'm not sure this is suited to your needs but maybe the entity reference module might be able to help you :


  Provides a field type that can reference arbitrary entities:
  
  A generic entity reference field Four widgets:
  Two implemented on top of the Options module (Select and Radios/Checkboxes),
  Two autocomplete
  widgets (one with one text field per entry, one tag-style with
  comma-separated entries in the same text field)
  Two formatters:
  A
  "Label" formatter, with optional link that displays the label of the
  referenced entity (the node title, the user name, etc.)
  A "Rendered
  entity" formatter, that renders the references entity using a
  configurable view mode Integration with Views (for both forward and
  backward references)
           Integration with Entity Metadata (and as a
  consequence with Search API and the like) Integration with Devel
  generate Integration with Feeds and Migrate (>= 2.3) for painless data
  import This modules depends on Entity API and CTools.