There is no way to do this within the program.
Some people have been able to do this using a program call DV Date. However, I'm not sure this program is available for the Mac.
Here is its download page.
Thank you Steve for you quick and prompt reply, although it is sad that such a basic functionality is missing. It would save lots of time at least for me. It seems that DV Date is not available for Mac's.
I have just started using Premiere Elements 11 and after I had written over twenty dates by hand, I suddenly discovered that all of them had changed to one, i.e. to the latest date I've used. My workflow is that once I make the first date and adjust its length, font, size, etc., I copy it over the next preferred clip and only retype the date. Then again, copy, change date and so on. This process started well, but eventually all the dates were exactly same. What happened? That surprising problem was the main reason why I asked the first question as I don't want it to happen again. Any clue to this?
all the dates were exactly same
That is what copy/paste does.
For each date you need to make a new text box.
You can set up a keyboard shortcut to quickly acces the new textbox.
I have default text set to F9. (text > new text > default text)
Set the playhead and hit F9. And voila textbox appears and type away.
You can also set up your text in advanced say in Word.
Then all you have to do is copy/paste from Word into the titler.
For burnt in metadata you may want to look at this;
It only runs on windows but under Rendering there is an explanation/option for running on a mac.
Download the trail and give it a spin.
For the Titles, that you are using (basically a variation on Lower-Third Titles), you will want to use the Duplicate function, to create new Titles, based on the "master Title," that you created. Otherwise, you will only have Instances of that Title, and any change to any of those Instances WILL alter them all.
See this article for more background on Titles in Premiere: http://forums.adobe.com/thread/1131177?tstart=0
As for an automatic Date/Time utility for the Mac, unfortunately I cannot help, being a PC-only guy - sorry.