Hi Lesm,
Edit the file 'index.php' in the calendar root and change line 243 from . . .
if (empty($_SESSION[$calID]['cD'])) { $_SESSION[$calID]['cD'] = $today; } //empty: today
to . . .
if (empty($_SESSION[$calID]['cD'])) { $_SESSION[$calID]['cD'] = '1842-06-15'; }
. . . to go to June 15, 1842 for example.
Note: If on the admin's Settings page, in the section User Accounts, "Restore last user selections has been checked, the The "next" default page will be the last selected page.
This is the "fixed" solution. Do you want the option to set the date on the admin's Settings page?
If so, I will do it for you, because explaining what to do is as much work as doing it 
Roel