What's the quickest way to move in a calendar folder to the same date one year earlier or one year later?

Outlook has a nifty Go to Date dialog box that supports the same date-calculation shorthand as date fields in appointment, task, and journal items. Press Ctrl+G to display the dialog box, which Figure 1 shows. The box should show the date currently displayed in the calendar. Press End to put the cursor after the date, then type + 1y to add one year to the date and press Enter.

Unfortunately, this trick doesn't work in reverse. Appending - 1y to the displayed date results in an error. You must replace the year in the dialog box with the year you want to display.