Time clock standards - Revision history

Heth: /* Examples */

2013-10-31T06:05:43Z

‎Examples

Heth: /* Examples */

2013-10-31T06:05:12Z

‎Examples

Heth: /* Examples */

2013-10-31T05:54:16Z

‎Examples

Heth: /* Present day */

2013-07-09T08:47:43Z

‎Present day

Heth: /* DST confusion */

2013-07-09T07:50:02Z

‎DST confusion

Heth: /* DST confusion */

2013-07-09T06:13:47Z

‎DST confusion

Heth: /* DST confusion */

2013-07-09T05:49:01Z

‎DST confusion

Heth: /* DST confusion */

2013-07-09T05:47:30Z

‎DST confusion

Heth: /* DST confusion */

2013-07-09T05:47:07Z

‎DST confusion

Heth at 05:45, 9 July 2013

2013-07-09T05:45:39Z

@@ Line 60: / Line 60: @@
 **Denmark at time zone UTC+1 summer time begins last Sunday in March at local time 02:00, time zone then at UTC+2.
 **Denmark at time zone UTC+1 summer time ends last Sunday in October at local time 03:00, time zone back to UTC+1.
-*Greenland, which spans four time zones, are using UTC-3 in all time zones, except areas around Qaanaaq, Danmarkshavn and Ittoqqortoormiit which uses UTC-4.<ref>[http://www.worldtimezone.com/dst_news/dst_news_greenland00.html Greenland summer time]<ref>
+*Greenland, which spans four time zones, are using UTC-3 in all time zones, except areas around Qaanaaq, Danmarkshavn and Ittoqqortoormiit which uses UTC-4.<ref>[http://www.worldtimezone.com/dst_news/dst_news_greenland00.html Greenland summer time]</ref>
 **Greenland at time zone UTC-3 summer time begins last Saturday in March at local time 22:00, time zone then at UTC-2.
 **Greenland at time zone UTC-3 summer time begins last Saturday in October at local time 23:00, time zone then at UTC-3.
@@ Line 68: / Line 68: @@
 *Since 2007 summer time begins (clocks go forward) at 2:00 AM on the second Sunday of March, by adding one hour. (Note the difference in date and clock time from CEST)
 *Since 2007 summer time ends (clocks go backward) at 2:00 AM on the first Sunday of November, by removing one hour. (Note the difference in date and clock time from CEST)
 ==DST confusion==
 On the southern hemisphere, Australia<ref>[[w:Time_in_Australia#Daylight_saving_time_(DST)|Australia Daylight saving time]]</ref> for example, summer time begins first Sunday in October and ends the first Sunday in April, during Winter in the Northern hemisphere. Three territories in Australia have abandoned DST, adding to the confusion. Australia uses three time zones UTC+8, UTC+9:30 and UTC+10 and five time zones during summer time UTC+8, UTC+9:30, UTC+10, UTC+10:30 and UTC+11<ref>[[w:Time_in_Australia#Time_zones_and_legislation]]</ref>. Some territories using half hour off time zones.

@@ Line 60: / Line 60: @@
 **Denmark at time zone UTC+1 summer time begins last Sunday in March at local time 02:00, time zone then at UTC+2.
 **Denmark at time zone UTC+1 summer time ends last Sunday in October at local time 03:00, time zone back to UTC+1.
-*Greenland, which spans four time zones, are using UTC-3 in all time zones, except areas around Qaanaaq, Danmarkshavn and Ittoqqortoormiit which uses UTC-4.
+*Greenland, which spans four time zones, are using UTC-3 in all time zones, except areas around Qaanaaq, Danmarkshavn and Ittoqqortoormiit which uses UTC-4.<ref>[http://www.worldtimezone.com/dst_news/dst_news_greenland00.html Greenland summer time]<ref>
-**Greenland at time zone UTC-3 summer time begins last Sunday in March at local time 22:00, time zone then at UTC-2.
+**Greenland at time zone UTC-3 summer time begins last Saturday in March at local time 22:00, time zone then at UTC-2.
-**Greenland at time zone UTC-3 summer time begins last Sunday in October at local time 23:00, time zone then at UTC-3.
+**Greenland at time zone UTC-3 summer time begins last Saturday in October at local time 23:00, time zone then at UTC-3.
 ===DST in the United States===

@@ Line 59: / Line 59: @@
 *Denmark using time zone UTC+1<ref>[[w:Summer_Time_in_Europe|Summer Time in Europe]]</ref>
 **Denmark at time zone UTC+1 summer time begins last Sunday in March at local time 02:00, time zone then at UTC+2.
-**Denmark at time zone UTC+1 summer time ends last Sunday in March at local time 03:00, time zone back to UTC+1.
+**Denmark at time zone UTC+1 summer time ends last Sunday in October at local time 03:00, time zone back to UTC+1.
 *Greenland, which spans four time zones, are using UTC-3 in all time zones, except areas around Qaanaaq, Danmarkshavn and Ittoqqortoormiit which uses UTC-4.
 **Greenland at time zone UTC-3 summer time begins last Sunday in March at local time 22:00, time zone then at UTC-2.
-**Greenland at time zone UTC-3 summer time begins last Sunday in March at local time 23:00, time zone then at UTC-3.
+**Greenland at time zone UTC-3 summer time begins last Sunday in October at local time 23:00, time zone then at UTC-3.
 ===DST in the United States===
 All States and areas participating in DST change to summer time at the same moment, regardless of their timezone.<ref>[[w:Daylight_saving_time_in_the_United_States#Time_zones|Daylight saving time in the United States]]</ref>

@@ Line 17: / Line 17: @@
 ===Present day===
-To day the second is defined as the duration of 9.192.631.770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the Caesium 133 atom<ref>[http://en.wikipedia.org/wiki/Second#cite_note-BIPM21-1 The unit of time - The second]</ref><ref>[[w:List of atomic clocks|List of atomic clocks]]</ref>.
+To day the second SI-unit<ref>[[w:International System of Units|SI the International System of Units]]</ref>is defined as the duration of 9.192.631.770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the Caesium 133 atom<ref>[http://en.wikipedia.org/wiki/Second#cite_note-BIPM21-1 The unit of time - The second]</ref><ref>[[w:List of atomic clocks|List of atomic clocks]]</ref>. The scientific SI second used today is a little slower than the actual solar second adding to necessity of adding occasional leap seconds.
 ====Leap second====

← Older revision		Revision as of 07:50, 9 July 2013
Line 71:		Line 71:

	New Zealand using DST from the last Sunday in September until the first Sunday in April.<ref>[[w:Time_in_New_Zealand#Daylight saving time\|New Zealand Daylight saving time]]</ref>		New Zealand using DST from the last Sunday in September until the first Sunday in April.<ref>[[w:Time_in_New_Zealand#Daylight saving time\|New Zealand Daylight saving time]]</ref>
−
−	~~In Australia~~

	It can be quite confusing to arrange International video conferences inviting participants using their local time in the invitations.		It can be quite confusing to arrange International video conferences inviting participants using their local time in the invitations.

← Older revision		Revision as of 05:49, 9 July 2013
Line 70:		Line 70:
	On the southern hemisphere, Australia<ref>[[w:Time_in_Australia#Daylight_saving_time_(DST)\|Australia Daylight saving time]]</ref> for example, summer time begins first Sunday in October and ends the first Sunday in April, during Winter in the Northern hemisphere. Three territories in Australia have abandoned DST, adding to the confusion. New Zealand using DST from the last Sunday in September until the first Sunday in April.<ref>[[w:Time_in_New_Zealand#Daylight saving time\|New Zealand Daylight saving time]]</ref>		On the southern hemisphere, Australia<ref>[[w:Time_in_Australia#Daylight_saving_time_(DST)\|Australia Daylight saving time]]</ref> for example, summer time begins first Sunday in October and ends the first Sunday in April, during Winter in the Northern hemisphere. Three territories in Australia have abandoned DST, adding to the confusion. New Zealand using DST from the last Sunday in September until the first Sunday in April.<ref>[[w:Time_in_New_Zealand#Daylight saving time\|New Zealand Daylight saving time]]</ref>

−	It can be quite confusing to arrange International video conferences using local ~~times~~ in the invitations.	+	It can be quite confusing to arrange International video conferences inviting participants using their local time in the invitations.