Don't know much about B6 in regard to its frequent traveler program.

I am trying to trade some US DM miles away and thought I saw a possible deal in the making with a member who has B6 miles.

I posted a question about the B6 Trueblue award in the trade forum and was advised I would need to post my question here instead. So, here goes...

With a B6 award that has an upcoming booking expiration date (but the travel date can be later than the booking expiration date), what is the flexibility to change the travel date later, should it become necessary?

Thank you in advance for response!