The slideshow feature in iPhoto is great for quickly viewing a bunch of images in all their full-screen splendor. After selecting a number of images (or an album, event, etc.) in iPhoto, just click the Play button at the lower left of the iPhoto window, fill in the settings for your slideshow, then click Play.
While the settings screen will let you display the titles and ratings for your photos, you can’t display the date the photos were taken. If you’d like to see the date displayed with each photo, here’s a little workaround. Note that this will only work if you’re not using the Title field for anything other than the default (filename). First, select the photos you’d like to view in the slideshow—you can create an album if you wish, or just select them from an event in your library.
Next, select Photos -> Batch Change, and in the drop-down window that appears, change the Set drop-down menu to Title, then set the To drop-down menu to Date/Time. You’ll then be able to customize the date/time display; change the settings to your liking, then click OK. iPhoto will then change the title on all of your selected images, replacing each title with the date and time, in the format you just specified.
Now click the Slideshow button and make sure the Show Titles box is checked, then click Play. You’ll see the date and time in the upper left corner of each slide as the slideshow progresses.
When you’re done with the slideshow, assuming you don’t want to permanently keep the photos’ titles set to the date and time, choose Photos -> Batch Change again. Select Title in the first drop-down menu, and Filename in the second, then click OK. This will change all the images’ titles back to their filenames.
If you use iDVD for slideshows, you can use this same trick there—just use Batch Change in iPhoto first, then create your slideshow in iDVD—just make sure you have the Title and Comments box checked in the slideshow settings panel. iDVD displays the date and time in a much larger font against a translucent background, in the lower left corner of each slide. When you’re done burning your iDVD project, switch back to iPhoto and use the Batch Change feature to set the photos’ titles back to their filenames.