### Question
Can you define what calendar year means?


### Answer
**Calendar year** is defined as the following in *26 U.S.C. § 441*:

> a period of 12 months ending on December 31

#### Citation:
  - *26 U.S.C. § 441*
  - Heading: **Subtitle A-Income Taxes > CHAPTER 1-NORMAL TAXES AND SURTAXES > Subchapter E-Accounting Periods and Methods of Accounting > PART I-ACCOUNTING PERIODS**

