similar to: daylight saving / time zone issues with as.POSIXlt/as.POSIXct (PR#10392)

tplate at acm.org wrote: > Running under Windows XP 64 bit, as.POSIXlt()/as.POSIXct() seem > to think that US time zones (EST5EDT, MST7MDT) switched from daylight > savings back to standard time on Oct 28, 2007, whereas the switch > is actually on Sun Nov 04, 2007. > > =20 Not Our Problem. (This sort of thing never is. We are wholly dependent=20 on the OS for this information).

I'm having difficulties with daylight saving times in US time zones. (Apologies for the long post, but the problem seems subtle and complex, unless I'm doing something completely wrong, in which case it should be evident from the first 10 lines below.) This is what I see, using a (slightly modified) example from ?as.POSIXlt : > as.POSIXlt((d <- Sys.time()), "EST5EDT") #

Hello, I just built openssh 3.8p1 on an HP-UX 11i machine. All looks well except for the timezone. I'm noticing now that when it logs stuff to syslog, it's off by 2 hours for me. What I've figured is this: My timezone is MST7MDT (mountain time). The timezone in /etc/default/tz is EST5EDT (eastern time). There's a 2 hour difference between mountain & eastern time. What

Apologies for the intrusion. I am a lurker on list. I have been working to convert a digitized signal from a matlab file into R for analysis and other applications. R.matlab is working fine, and it is easy to convert the matlab date-time number (days since year 0) into R date-time numbers (seconds since 1970-01-01). Unfortunately, when I cast the R date-time number into POSIXct format it seems

Colleagues, I submitted this several days ago and no one responded, so I am trying again, trying a different subject line: I just encountered some unexpected behavior of difftime in relationship to the change from daylight savings to standard time. My understanding is that DST and ST take effect at 2AM. However, the results below suggests that R (version 2.8.0 in OS X) implements the

The documentation for the POSIXlt class states '"POSIXlt" objects will often have an attribute "tzone", a character vector of length 3 giving the time zone name from the TZ environment variable and the names of the base time zone and the alternate (daylight-saving) time zone. Sometimes this may just be of length one, giving the time zone

There is incompatibility between R strptime and musl libc. I posted about it on their mailing list, but they need more information I can't provide, so I'm forwarding the message here in hope R developers can help. Thanks. ---------- Forwarded message ---------- From: Rich Felker <dalias at libc.org> Date: Thu, Feb 4, 2016 at 2:07 PM Subject: Re: [musl] strptime() question To: Alba

I have a data frame that contains dates, but when I use as.POSIXlt() I lose the hours on all records. I traced this down to a particuar hour which causes the issue... > as.POSIXlt('2004-10-31 02:00:00') [1] "2004-10-31" > as.POSIXlt('2004-10-31 03:00:00') [1] "2004-10-31 03:00:00" How do I tell as.POSIXlt() to ignore daylight savings and just convert to

I am analysing some data collected over a number of months from Allentown, PA, which is just north of Philadelphia. I am using as.POSIXct for dates and times, and I need to get the timezone specification correct. Going on the documentation for DateTimeClasses, I believe one way to specify the correct time zone is tz="EST5EDT" I would be grateful for any advice on this. I ask

Who is tired of dealing with DST changes? I have asterisk running on FC4, FC4 has been patched and shows the correct MDT timezone and time. Email notifications of voicemail show the message time an hour early (standard time, not daylight). This si the time in the message body, not the email delivery time, so it is coming form asterisk wrong. I did a reload after correcting the

Full_Name: Erich Neuwirth Version: 2.3.1 OS: Windows XP, Linux Submission from: (NULL) (131.130.135.167) Converting Sys.Date() to a POSIX compliant time type in different ways produces inconsistent results: > Sys.date() [1] "2006-09-01" > as.POSIXct(Sys.Date()) [1] "2006-09-01 02:00:00 CEST" > as.POSIXlt(Sys.Date()) [1] "2006-09-01" >

Hi, I''ve been trying to do timezone conversion, and have some trouble getting it to work on my Windows machine. Searching the web, I found http://wiki.rubyonrails.com/rails/pages/HowtoSetDefaultTimeZone ...which explains how to set the default timezone. I''m using an environment.rb that include the lines: ActiveRecord::Base.default_timezone = :utc ENV[''TZ''] =

Hello, Suppose we need a function that takes a POSIXct object and need to calculate the time difference between it and GMT time: gmtDiff <- function(time) { time.gmt <- as.POSIXct(format(time, tz="GMT")) time.plt <- as.POSIXlt(time) dlstime <- ifelse(time.plt$isdst > 0, 1, 0) timezone <- as.numeric(difftime(time, time.gmt, units="hours"))

Greetings - I'm battling POSIXct, as per the code below. My input is actually an XL file, but the weird results below correctly model what I am seeing in my program. Before I punt and use lubridate or timeDate, could anyone please help me understand why POSIXct forces my variable back to GMT? I suspect that I'm not properly coding the tzone value, but it does not throw an

Hello, I'm trying to convert times in the EST/EDT (New York) format to times in the GMT/BST (London) and UTC+9 format (Tokyo). That is, if I know what time it is in New York, what is local time in London and Tokyo? Ex: Here's the conversion from New York EST/EDT time to London's GMT/BST time zone for three days in 2007. Note that the US and London change to daylight savings on

Tracking down this bug was joint work with Jermoe Asselin (jerome at hivnet.ubc.ca) and Patrick Connolly (p.connolly at hortresearch.co.nz). We collectively were able to determine that this is a problem in both Windows 2000 and in Linux and by testing it in our three time zones that it seems to be daylight savings time related. Conversion of POSIXlt datetimes to POSIXct appears to have problems.

Hi, Normally daylight date change last sunday march for Turkey but this year daylight saving time will change for Turkey at 28 March 2011 at 03.00 AM so how can i change daylight save time setting for this year on CentOS servers ? I wrote rule file like below and compile it with zic but when I compile rule file,it has changed date immediately but it should be change at 28 March 2011 03.00 AM.

are your workstations w98 ?? or nt/w2k ?? (have the same here, only with w98 ws) you can also use net time /SETSNTP:ntp server Collen Friday, February 13, 2004, 3:45:21 PM, you wrote: TFGF> I already configured my time zone, daylight, etc..... TFGF> The server date is correct. I already compiled a TimeZone file(.ZIC) with TFGF> the correct date for DayLight saving. TFGF> The

Hi, I am in Australian. Now it is daylight saving time in Australian. I have daysaving time issue on samba client as below. On AIX server, I get the following two files's modified time via command istat. /zytest/file1 (Modified time: Fri Sep 18 12:07:37 EST 2009) /zytest/file1 (Modified time: Sun Nov 1 13:42:16 EDT 2009) On samba client Windows machine, the modified time

Hi, I'd set the daylight saving option to yes on all the GXP-2000 phones, but apparantly it doesn't move it an hour back on last sunday of October. So now I am stuck will all the phones showing the wrong time. Isn't there an option so that it'll automatically update daylight savings? Thanks -- Zeeshan A Zakaria -------------- next part -------------- An HTML attachment was