Guyana
calendar year
Haiti
1 October - 30 September
Holy See (Vatican City)
calendar year
Honduras
calendar year
Hong Kong
1 April - 31 March
Hungary
calendar year
Iceland
calendar year
India
1 April - 31 March
Indonesia
calendar year; note - previously was 1 April - 31 March,
but starting with 2001, has been changed to calendar year
Iran
21 March - 20 March