Fiscal year means the fiscal year for the Federal government, which begins each year October 1 and ends on September 30. The fiscal year is designated by the calendar year in which it ends, e.g., fiscal year 2002 is the year beginning October 1, 2001, and ending September 30, 2002.
49 CFR § 1511.3
The following definitions apply for purposes of this part. For other definitions that may be applicable to this part refer to 49 U.S.C. 40102.