ARB start date is 1/29. Then, when is the billing date on Feb? The last day?

[wings9]

The document says if the ARB start date is the 31st, billing date will be the last day of the month.

What if the start date is 1/29? The billing date will be the last day (28th) for February and 29th for the other months?

Thank you!

[RaynorC1emen7]

http://community.developer.authorize.net/t5/Integration-and-Testing/How-many-days-in-an-Authorize-ne...