--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Symbian3/SDK/Source/GUID-B1DD21A3-674A-5193-95CF-F533FDBBD319.dita	Thu Jan 21 18:18:20 2010 +0000
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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
+<!-- This component and the accompanying materials are made available under the terms of the License 
+"Eclipse Public License v1.0" which accompanies this distribution, 
+and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
+<!-- Initial Contributors:
+    Nokia Corporation - initial contribution.
+Contributors: 
+-->
+<!DOCTYPE concept
+  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
+<concept id="GUID-B1DD21A3-674A-5193-95CF-F533FDBBD319" xml:lang="en"><title>Using
+Date and Time Handling</title><shortdesc>Explains how to manipulate Date and Time.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
+<p>Points in time are stored and manipulated using the <codeph>TTime</codeph> class. <codeph>TTime</codeph> uses
+a 64-bit integer to represent time as the number of microseconds since midnight
+on 1st January 0 AD, using a nominal Gregorian calendar. This gives a possible
+range of 580,000 years.</p>
+<p>The date/time and its individual components may be set and retrieved using
+the <codeph>TDateTime</codeph> class. <codeph>TDateTime</codeph> is the human
+readable form of <codeph>TTime</codeph>. It is provided to allow easy user
+access to the year, month, day, hour, minute, second and microsecond components
+of the time. It does not support manipulation of the date/time, or of its
+components, but may be converted into a <codeph>TTime</codeph>, and vice versa.</p>
+<p>Intervals between points in time are represented by the classes derived
+from <codeph>TTimeIntervalBase</codeph> and by class <codeph>TTimeIntervalMicroSeconds</codeph>.
+Time intervals can be added or subtracted, either to or from each other or
+to or from points in time. Time interval classes exist because adding two
+points in time or subtracting one point in time from another is not possible.</p>
+<p>The <codeph>Time</codeph> class is a collection of time related utility
+functions; for example, functions that check for leap years and return the
+number of days in the month.</p>
+<section id="GUID-EA8DB5D2-2979-44A9-9D12-AB454050B03E"><title>Arithmetic operations</title> <p>Care should be taken when
+performing arithmetic operations on <codeph>TTime</codeph> s especially when
+dealing with the last day in the month. For example: </p> <ul>
+<li id="GUID-81A3ED23-55B5-5BEF-A2C5-D05458512637"><p>adding one month to
+October 18th adds 31 days</p> </li>
+<li id="GUID-CBF68BC9-7F83-5FEC-B5BC-2E63906A5747"><p>adding one month to
+November 18th adds 30 days</p> </li>
+<li id="GUID-019F031D-5228-594E-8ECF-9DCAA7C04B09"><p>adding one year to February
+29th, 1996 gives Feb 28th, 1997</p> </li>
+<li id="GUID-D019C0F8-9B74-5405-82D4-1ECEB7C3329B"><p>adding one month to
+March 31st gives April 30th but subtracting one month from April 30th gives
+March 30th</p> </li>
+</ul> </section>
+</conbody></concept>
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