### Question
How does the law define day?


### Answer
Under *19 U.S.C. § 1401*, **day** is defined as:

> the time from eight o'clock antemeridian to five o'clock postmeridian.

#### Citation:
  - *19 U.S.C. § 1401*
  - Heading: **CHAPTER 3-THE TARIFF AND RELATED PROVISIONS > SUBTITLE III-ADMINISTRATIVE PROVISIONS > Part I-Definitions and National Customs Automation Program > subpart a-definitions**

