AppleScript: get and reformat current date, then insert it in any text field?

Hi,

I’m about to create an AppleScript that can reformat the current date into a YY-MM-DD string and then insert the result in any active text field.

Here’s exactly what I want:

1. Get the current date.
2. Reformat and convert that date to a YY-MM-DD string.
3. Insert that string into a text field via System Events keystrokes.

So far, I’ve only figured out step 3:

tell application “System Events” to keystroke current_date

Step 1 is also faitly obvious, but I’m stuck in step 2 – on how to reformat the date into something less verbose.