118 lines
7.3 KiB
HTML
118 lines
7.3 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Time" />
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<meta name="abstract" content="Use this information to understand time concepts such as time zones, coordinated universal time, system time, and job time." />
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<meta name="description" content="Use this information to understand time concepts such as time zones, coordinated universal time, system time, and job time." />
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<meta name="DC.Relation" scheme="URI" content="rzaticoncepts.htm" />
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<meta name="DC.Relation" scheme="URI" content="../rzakz/rzakzqtime.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzatiutc.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzatitimezone.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzatidst.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzatimanagetz.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 1998, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzatitime" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Time</title>
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</head>
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<body id="rzatitime"><a name="rzatitime"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Time</h1>
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<div><p>Use this information to understand time concepts such as time zones,
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coordinated universal time, system time, and job time.</p>
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<p>Time on a system involves several time concepts. Each system or partition
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uses system time. The system time is displayed using the time of day system
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value.</p>
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<p>System time is one important time concept. However, you need to understand
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the various time concepts that play an important role in time management.
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The following concepts are important concepts that relate to
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time:</p>
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<dl><dt class="dlterm">Local system time (system time)</dt>
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<dd>Local system time is determined by applying the system's time zone offset
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to coordinated universal time (UTC). The time of day system value displays
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the local system time. Local system time and system time are used interchangeably.</dd>
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<dt class="dlterm">Local job time</dt>
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<dd>Local job time is determined by applying the job's time zone offset to
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UTC. To view a job's local date and time, view the Date/Time page of the job's
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properties.</dd>
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<dt class="dlterm">Coordinated universal time</dt>
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<dd>Coordinated universal time (UTC) is used to calculate local system time
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and job time. The offset from UTC is applied to UTC time to calculate the
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local system time (system time).</dd>
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<dt class="dlterm">Offset from coordinated universal time</dt>
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<dd>Represents the difference in hours and minutes between UTC and the local
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system time. A negative offset indicates that the time is west of UTC and
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a positive offset indicates that the time is east of UTC.</dd>
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<dt class="dlterm">Time zone</dt>
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<dd>The time zone settings specify the offset from UTC and whether to observe
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daylight saving time or not. Each logical partition on a system can specify
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a time zone to use.</dd>
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</dl>
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<p>To combine these time concepts into the various time values associated
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with an iSeries™ server,
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examine two servers that use different time zones.</p>
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<br /><img src="rzati507.gif" alt="Server A is in the Central Standard Time zone and Server B is in the Beijing Standard Time zone." /><br /><p>This figure shows two servers in two different time zones. Server A is
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in the Central Standard Time zone and Server B is in the Beijing Standard
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Time zone.</p>
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<p>Each server's time values are as follows:</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="void" border="0" rules="none"><thead align="left"><tr><th valign="top" class="firstcol" id="d0e62"> </th>
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<th valign="top" id="d0e63">Server A</th>
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<th valign="top" id="d0e65">Server B</th>
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</tr>
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</thead>
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<tbody><tr><th valign="top" class="firstcol" id="d0e69" headers="d0e62 ">Local system time</th>
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<td valign="top" headers="d0e69 d0e63 ">8:00 a.m.</td>
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<td valign="top" headers="d0e69 d0e65 ">10:00 p.m.</td>
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</tr>
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<tr><th valign="top" class="firstcol" id="d0e76" headers="d0e62 ">Local job time</th>
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<td valign="top" headers="d0e76 d0e63 ">8:00 a.m.</td>
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<td valign="top" headers="d0e76 d0e65 ">10:00 p.m.</td>
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</tr>
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<tr><th valign="top" class="firstcol" id="d0e83" headers="d0e62 ">Time zone</th>
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<td valign="top" headers="d0e83 d0e63 ">Central Standard Time</td>
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<td valign="top" headers="d0e83 d0e65 ">Beijing Standard Time</td>
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</tr>
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<tr><th valign="top" class="firstcol" id="d0e90" headers="d0e62 ">Offset from UTC</th>
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<td valign="top" headers="d0e90 d0e63 ">-6:00</td>
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<td valign="top" headers="d0e90 d0e65 ">+8:00</td>
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</tr>
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<tr><th valign="top" class="firstcol" id="d0e97" headers="d0e62 ">UTC</th>
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<td valign="top" headers="d0e97 d0e63 ">2:00 p.m.</td>
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<td valign="top" headers="d0e97 d0e65 ">2:00 p.m.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaticoncepts.htm" title="Use this information to understand time management concepts such as time zones, coordinated universal time (UTC), and daylight saving time (DST).">Concepts</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzatiutc.htm" title="Coordinated universal time (UTC) is a time scale that is kept by time laboratories around the world and is determined by using highly precise atomic clocks. The UTC time is accurate to approximately a nanosecond (billionth of a second) per day. UTC is located at 0 degrees latitude, the Prime Meridian.">Coordinated universal time</a></div>
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<div><a href="rzatitimezone.htm" title="Use this information to understand the time zones that are included with the system and their properties. You can use one of the time zones included with the system or create your own.">Time zone</a></div>
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<div><a href="rzatidst.htm" title="Use this information to understand daylight saving time (DST). Find out what DST is and which time zones use DST.">Daylight saving time</a></div>
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<div><a href="rzatimanagetz.htm" title="View this topic to learn how to effectively use time zones. You will learn how to create and edit time zones as well as set the time zone system value.">Manage time zones</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="../rzakz/rzakzqtime.htm">Time of day (QDATETIME) system value</a></div>
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</div>
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</div>
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</body>
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</html>
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