Custom field date => sort threads by this date ?

[ZiNgA BuRgA]

Now that I think about it, you can probably sort by text, but the date needs to be inputted differently.
If you want to do this, ignore what I said above, and use a custom text mask filter:

Code:

^((?:19|20)\d\d)/(0?[1-9]|1[012])/(0?[1-9]|[12]\d|3[01])$

---

This will allow "1983/11/04" - which makes it sortable.

Note that if you already have existing data, you'll need to convert it to the new format.
For the output format, try something like:

Code:

<?=date('d F Y', strtotime({VALUE}))?>

---

Sorting is explained in the supplied documentation (the "Documentation" folder in the XThreads download package).
Basically, just reuse MyBB's sortby parameter, eg "forumdisplay.php?fid=2&sortby=tf_myfield"