JavaScript Reference

Quick Reference

The Date getUTCHours() method returns the hour (0 to 23) of a Date object, according to UTC: 12am = 0, 1am = 1, 2am = 2 … 11pm = 23.

It can also set minutes, seconds and milliseconds.

<!-- html element to place output -->
<p id="my_output"></p>
// variable
let my_date = new Date();

// set date
my_date.setUTCHours(12);

// output to the HTML element
document.getElementById('my_output').innerHTML = my_date.getUTCHours();

Output

12

Syntax

Date.setUTCHours(hour, min, sec, millisec)

Parameters

ValueDescription
hourThe Hours (0 to 23) (required)
Other values:
  • -1 gives the last hour of the previous day
  • 24 gives the first hour of the next day
minThe Minutes (0 to 59)
Other values:
  • -1 gives the last minute of the previous hour
  • 60 gives the first minute of the next hour
secThe seconds (0 to 59)
Other values:
  • -1 gives the last second of the previous minute
  • 60 gives the first second of the next minute
millisecThe milliseconds (0 to 999)
Other values:
  • -1 gives the last millisecond of the previous second
  • 1000 gives the first millisecond of the next second

JavaScript Notes:

  • When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • JavaScript is a case-sensitive language; firstName is NOT the same as firstname
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
  • JavaScript variables must begin with a letter, $, or _
  • JavaScript variables are case sensitive (x is not the same as X)

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.