In Configuration, General, there is an option to establish the start date (mm/dd) of the volunteer year. The 'Total for Volunteer Year as of Start Date' calculates the # of hours between the volunteer start date this year and the start date of the report.

For example:

The volunteer year starts 01/01

Robert Hernandez has 2 time sheets:

Photographer 02/01/03 15 hours

Crowd Control 10/12/03  11 hours

We run the report for this specific date range of 10/01/03 - 12/01/03

The Total as of Start Date shows 15 hours as the Photographer time sheet instance happens between 01/01/03 (volunteer year start date for this year) and the start date of the report 10/01/03