Authorize.net ARB subscriptions fail with "E00017:Start Date must not occur before the submission date."

Running CiviCRM 3.3.5 and Drupal 6.20.

Our server is set to Pacific time. When users create ARB subscriptions between 11pm and midnight, they receive the message "E00017:Start Date must not occur before the submission date." The ARB documentation (http://www.authorize.net/support/ARB_guide.pdf) says, "Validation is performed against local server time, which is Mountain Time." The file CRM/Core/Payment/AuthorizeNet.php, line 232 does not adjust the timezone to Mountain time before printing the date, which will cause the error in any server west of the Rockies.

To duplicate:

1. Set up an authorize.net payment processor, and a CiviContribute page that takes recurring payments.
2. Adjust the system's timezone to Pacific time.
3. Wait until 11:30 PM Pacific time, and create a subscription.

What should happen: The payment should go through.

What happens: The above-described error is displayed to the user and the subscription is not started, nor does the user have any workaround except for to wait an hour.

As a workaround, I'm going to adjust the timezone of my Drupal setup to Mountain time. We'll see if that works.