Suitable for passing to console.gettemplate() when prompting for a birth date.

I'm using like this in my logon.js to correct corrupted newuser birth dates:
  while(user.age < 10) {
	console.putmsg(bbs.text(bbs.text.EnterYourBirthday));
	user.birthdate = console.gettemplate(system.birthdate_template);
  }