I've copied/pasted/reposted this friendly reminder -
For what it's worth, and to whom it may concern:
About the date stamp feature:
that's in the box on the left side, at the bottom beneath your name,
as the person posting an item. (i.e. this one stamped: Sun Apr 19, 2015 6:53 am)
It may help to check the date of the post to which you/me are gonna respond & reply;
that is, if you want to be relevant as to the when part.
(I've made the mistake a few times myself; oops...)
Hope that's a helpful hint, to keep things fresh; even though there may be no expiration date.
Cheers,
Peter R.