No problems here with seeing days/hours and date/time on Facebook, but there have been more reports. Did you try the normal troubleshooting steps ?

See also:

• /questions/1413766 Facebook News Feed Not Displaying When Posts Were Created

I tried all that and still have problems. Thank you though.

Yes. This has been reported numerous times here, so I think it would be confirmed. The same goes for the "Sponsored" tags that are presented at the same location for ads. I think Facebook devs f* up, as the SVG is overflowing below and being cut off from display in Firefox, but works fine in Chrome. We should probably help bringing it to their attention, if they aren't testing with Firefox themselves.

Or just you Chrome since I'm also finding several other sites not working with Firefox.

Yea I've got exactly the same. Only shows time stamp on the first post on the page. Even in safe mode. Works fine in Chrome

Today some posts have the timestamp but most do not.

See also the discussion here:

• /questions/1413716 Date/time of older Facebook posts disappeared