Take a look at this post from a while ago:

http://blog.rememberthemilk.com/2009/04/tips-tricks-tuesday-using-sleeper-tags/

Probably that will suit your needs. It does for me ;-)

Thanks I will look into that!

Hello, thats a topics I am interested in too. your suggestion in the post is a work around. but it is not really perfect. I worked with a lot of different to do lists and this was a feature I always loved: setting a time frame in which a task is "active":
examples:
- call someone in a agreed week
- buy tickets as soon as they are on sale
etc.

Is something like this really not implemented in RTM?

Your suggestion has the disadvantege, that I have to select the "show me"-period based on the due date. I think the requested feature should have a seperate start and due-date.
any hints for me whether this is implemented?

beidernikl,
RTM does not currently offer a start date; sorry for any inconvenience.

You could devise a similar method to the sleeper tags based on the added date, if that would be preferable.