1Data::ICal::Entry::TimeUZsoenre:C:oDnatyrliibguhtte(d3D)Paetral::DIoCcaulm:e:nEtnattriyo:n:TimeZone::Daylight(3)
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NAME

6       Data::ICal::Entry::TimeZone::Daylight - Represents a Daylight Time base
7       offset from UTC for parent TimeZone
8

DESCRIPTION

10       A time zone is unambiguously defined by the set of time measurement
11       rules determined by the governing body for a given geographic area.
12       These rules describe at a minimum the base offset from UTC for the time
13       zone, often referred to as the Standard Time offset. Many locations
14       adjust their Standard Time forward or backward by one hour, in order to
15       accommodate seasonal changes in number of daylight hours, often
16       referred to as Daylight Saving Time. Some locations adjust their time
17       by a fraction of an hour. Standard Time is also known as Winter Time.
18       Daylight Saving Time is also known as Advanced Time, Summer Time, or
19       Legal Time in certain countries. The following table shows the changes
20       in time zone rules in effect for New York City starting from 1967. Each
21       line represents a description or rule for a particular observance.
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23            Effective Observance Rule
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25            Date       (Date/Time)             Offset  Abbreviation
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27            1967-*     last Sun in Oct, 02:00  -0500   EST
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29            1967-1973  last Sun in Apr, 02:00  -0400   EDT
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31            1974-1974  Jan 6,  02:00           -0400   EDT
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33            1975-1975  Feb 23, 02:00           -0400   EDT
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35            1976-1986  last Sun in Apr, 02:00  -0400   EDT
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37            1987-*     first Sun in Apr, 02:00 -0400   EDT
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39       Note: The specification of a global time zone registry is not addressed
40       by this document and is left for future study.  However, implementers
41       may find the Olson time zone database [TZ] a useful reference. It is an
42       informal, public-domain collection of time zone information, which is
43       currently being maintained by volunteer Internet participants, and is
44       used in several operating systems. This database contains current and
45       historical time zone information for a wide variety of locations around
46       the globe; it provides a time zone identifier for every unique time
47       zone rule set in actual use since 1970, with historical data going back
48       to the introduction of standard time.
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METHODS

51   ical_entry_type
52       Returns "DAYLIGHT", its iCalendar entry name.
53
54   mandatory_unique_properties
55       According to the iCalendar standard, the following properties must be
56       specified exactly one time in a daylight declaration:
57
58               dtstart  tzoffsetto  tzoffsetfrom
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60   optional_repeatable_properties
61       According to the iCalendar standard, the following properties may be
62       specified any number of times for a daylight declaration:
63
64               comment  rdate  rrule  tzname
65

AUTHOR

67       Jesse Vincent "<jesse@bestpractical.com>" with David Glasser, Simon
68       Wistow, and Alex Vandiver
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71       Copyright (c) 2005 - 2009, Best Practical Solutions, LLC.  All rights
72       reserved.
73
74       This module is free software; you can redistribute it and/or modify it
75       under the same terms as Perl itself. See perlartistic.
76

DISCLAIMER OF WARRANTY

78       BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
79       FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT
80       WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER
81       PARTIES PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND,
82       EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
83       WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
84       ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
85       YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
86       NECESSARY SERVICING, REPAIR, OR CORRECTION.
87
88       IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
89       WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
90       REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE LIABLE
91       TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, OR
92       CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
93       SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
94       RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
95       FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
96       SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
97       DAMAGES.
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101perl v5.12.0                      2009-D0a7t-a1:0:ICal::Entry::TimeZone::Daylight(3)
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