<p dir="ltr">Have there actually been any time zones that are not an even multiple of a whole minute since the advent of leap seconds? The only non whole minute time zone I know about is Dublin Mean Time, which hasn't been used since 1916.</p>
<div class="gmail_quote">On Feb 15, 2015 3:48 PM, "John Haxby" <<a href="mailto:john.haxby@oracle.com">john.haxby@oracle.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><br><div><blockquote type="cite"><div>On 15 Feb 2015, at 14:12, <a href="mailto:random832@fastmail.us" target="_blank">random832@fastmail.us</a> wrote:</div><br><div><span style="font-family:Menlo-Regular;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">Also, general question: is there any standard on how leap seconds are to</span><br style="font-family:Menlo-Regular;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="font-family:Menlo-Regular;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">be handled in timezones that have an offset that is not a multiple of</span><br style="font-family:Menlo-Regular;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><span style="font-family:Menlo-Regular;font-size:11px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;float:none;display:inline!important">one whole minute? What does tzcode do now?</span></div></blockquote></div><br><div>Leap seconds are inserted or deleted at midnight UTC at the end of March, June, September or December with at least three months notice. So a leap second could be inserted or deleted at about lunchtime in New Zealand or 5.30am in India.</div><div><br></div><div>jch</div></div></blockquote></div>