FY

FY or fy can stand for:

*Fiscal year, a 12-month period used for calculating annual financial reports in businesses and other organizations
*West Frisian language (ISO 639-1 alpha-2: FY), a language spoken mostly in the province of Fryslân in the north of the Netherlands
*Republic of Macedonia (NATO country code: FY)
*Feynmanium (¹³⁷Fy), a nickname for untriseptium (Uts), chemical element 137
*French Guiana (amateur radio call sign prefix: FY-)
*Fengyun, China's weather satellite series.