What is the difference in calendar year and fiscal year?

Calendar  year is the year shown in calendar ie Jan to Dec. Fiscal year is the financial year.

The only difference between the two is that individuals in the U.S. commonly use the term "fiscal year" when referring to a business accounting period. According to the Internal Revenue Service, IRS, a calendar year is a period of 12 months, which begin on January 1 and end on December 31.

1. Calendar year from January to December. Financial year April to March

A calendar year follows the January - December timeline (just like in the calendar) while the fiscal year is based on a 12 month period (e.g. July-June).