I see it just fine.
In the same place it has always been - upper left side of gray bar above each post. The post number is on the right side of the bar. Can you see the thread number for each post.
What browser are you using?
If you are on a cell phone or a netbook (something with a small screen) it may be a CSS issue that is causing the page to render poorly on your screen. If you are on a cell phone, what is the brand & model?
On my home system (LCD monitor 1440x900), when I make the window width as small as possible in Firefox, I can still see the date/time fine - in fact that is about all I can see!
Your post date and time currently shows as Yesterday 09:02 AM
This post's date and time currently shows as Today 06:43 AM
Tomorrow, or if you are in a different time zone the values may be different, but the info is on my screen.