Questions tagged [timezone]
When using or applying a TZ value.
243
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2
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Change special hh mm to another time zone
I want to change 0710 (07 hour 10 minute in GMT +0)
to 0810 (08 hour 10 minute in GMT +1)
what command in linux can do it?
Thank you for your support !
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1
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36
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timedatectl shows wrong local time
this the output of my timedatectl command on a proxmox VM running on a server in New Zealand with static IP:
$ timedatectl
Local time: Wed 2023-11-01 16:01:30 UTC
Universal ...
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1
vote
1
answer
80
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Add hours to the date and time
I have a requirement to add offset hours to the datetime value.
Get the previous date (e.g. 2023-10-19 00:00:00.000000)
previous_date=`TZ=TZ+24 date '+%Y-%m-%d 00:00:00.000000'`
Calculate the ...
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0
answers
27
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What environment variables should I track to explain a 10 minutes difference on a timestamp sent by a front application and received by a backend one?
Two Linux computers, I'm not knowing yet their exact settings, are running:
A front application, for the first
A backend application, for the second
I face the trouble that what the backend receives,...
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1
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54
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Dualboot | After synced time on windows linux time is wrong
After i synced the windows time my hardware clock time is bad.
timedatectl
Local time: Sun 2023-10-01 15:38:05 CEST
Universal time: Sun 2023-10-01 13:38:05 UTC
...
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0
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57
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Why jouranlctl uses --utc by default when running without root privigies?
On a host running Ubuntu 20.04 LTS I notice that, by default, journalctl (without root privileges) is the same as journalctl --utc, but with root privileges journalctl honors the time zone (as shown ...
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2
answers
1k
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How can I set a time zone on a Linux machine that has only very minimal cmds available?
I have a Linux machine that only has very minimal cmds available on it, for example the /bin looks like this:
/bin# ls
ash chattr clockdiff dd dumpkmap ...
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1
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101
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How to update time zone list in Linux (Debian)?
I'm going to set time zone to my locale on Debian. The DST has been removed in my region since the last year (2022, Sep.), but it's apparently not updated in Debian time zone list. What is the best ...
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2
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3
answers
308
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For what do you need to change hardwareclock and how?
I started Linux server (Amazon Linux 2) from scratch.
I'm in Tokyo locale and I changed timezone info like this;
ll /etc/localtime
# lrwxrwxrwx 1 root root 25 Feb 22 10:11 /etc/localtime -> ../usr/...
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0
answers
116
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Add timezone to HAProxy logs
I have a HAProxy (2.2.9) running on an Debian 11 machine and I would like to add the timezone to the HAProxy logs like Apache has: [25/Jul/2023:14:27:40 +0200].
I have found that I can use the log-...
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3
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543
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Why is there a difference between timezone America/Chicago (CST6CDT) and Etc/GMT-6?
Here is my code:
#include <time.h>
#include <stdio.h>
time_t my_timegm (struct tm *tm, char *tz_offset);
int
main (void)
{
struct tm time_tm;
time_t start_timet, end_timet;
...
0
votes
1
answer
125
views
How to change DST start and end dates for a timezone in Red Hat Enterprise Linux and Oracle Linux?
DST start and end dates keep changing over the years for different timezones. For example, I found below link where DST start and end dates are provided for EST for different years. https://www....
25
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4
answers
6k
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Should I (still) use UTC for all my servers?
My employer is located in Europe (CET), and therefore we use daylight saving time, which requires shifting an hour hence and forth twice a year. Our servers are running in the cloud in different ...
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1
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358
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How do I allow a non-root user to set the timezone via d-bus?
I am writing an application on an embedded Linux device that sets the Timezone as a non-root user. To boil things down to the essence, I want to execute this:
dbus-send --system --dest=org....
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3
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5k
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Hardware and System clock both wrong in linux
I dual booted my laptop and installed EndeavourOS (while other OS being windows 10)
Due to this, my hardware and system clock both show the wrong time.
I have set the correct time zone (UTC+5:30), ...
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1
answer
140
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How to fix Gnome Clock on Bar (date command seems to not use correct timezone)
Fedora 37 with Gnome Shell 43. On Status Bar on the top I see wrong time. But When I opening Gnome Clock app (this one https://wiki.gnome.org/Apps/Clocks) then I see correct time
Also when I typing ...
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1
answer
556
views
Use a different timezone for one cron job?
I have multiple cron jobs in one crontab (as usual). One of the jobs interacts with a remote system in another timezone, which means I need to adjust the crontab every time either timezone enters or ...
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2
answers
193
views
Where can I find a list of timezone options available during install process of a distro?
I'm building an app where it makes sense for the user to be able to select a different timezone than their actual own timezone for certain operations, without going too much into details, I can assure ...
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1
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982
views
How to change the time zone string of date command?
I'm curious about how to change the abbreviation of time zone shown by date command.
Let the time zone unchanged, but how to change CST below to UTC+8?
clay@LAPTOP-3PP2093I:~$ date
Thu Dec 1 23:05:28 ...
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1
answer
25
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Can `cal` show other Gregorian adoptions?
On my host I can show the adoption of the Gregorian calendar as it occurred for Great Britain and its colonies in 1752:
$ cal september 1752
September 1752
Su Mo Tu We Th Fr Sa
1 2 ...
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606
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In Linux distribution the list of timezones is empty
In a yocto-base Linux distribution is available the program timedatectl and it is necessary to set the timezone.
To do that exist the command:
timedatectl set-timezone <timezone>
The execution ...
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1
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2
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9k
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How do I make cron use UTC?
My local time zone is not UTC; How do I make cron use UTC for it's schedule without changing time zone on the computer in other aspects?
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496
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Is my zoneinfo backwards or am I confused
As far as I know, United States Eastern Time is GMT-5 for Eastern Standard Time, and GMT-4 for Eastern Daylight Time.
So why do these two commands give different hours in the answers?
laptop % TZ=...
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1
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239
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zdump and date do not show the same daylight saving information
I am using my localtime set to be Israel.
I updated the system clock and hardware clock, and using zdump I get:
~# zdump /usr/share/zoneinfo/Israel
/usr/share/zoneinfo/Israel Wed Apr 20 16:11:36 2022 ...
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1
answer
114
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How to update a locale and timezone on a static image that isn't running
I am building an Ubuntu static image (for flashing to a USB) where I want to preset the timezone and locale in that image so that it is already set when the image boots. It appears the only way to ...
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1
answer
9k
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How to disable DST changes for a timezone?
My system timezone is Asia/Tehran, and it has DST changes adjusts in Summer (spring forward) and fall back in Winter; however I do need to disable these DST adjustments and keep timezone always in UTC+...
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745
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timedatectl: problem with NTP returning localtime instead of UTC time
On my embedded Linux, I have a problem with time zones:
I'm trying to keep the UTC time in the RTC of the device. But somehow, timedatectl keeps adjusting time to the local time and not the UTC time, ...
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1
answer
3k
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Format datetime as UTC with strftime (for use in git)
I can format dates and time pretty flexibly with strftime, but from what I can see, this only will give times in my local timezone; I can add the timezone offset (e.g. '%Y %m %d-%H:%M:%S%z' for a ...
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152
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All of the modification times for my files have been shifted by 1 hour, how can I restore them en masse?
I have two copies of my data, one of which seems to have shifted the modification times by an hour inexplicably (well, we did have a daylight switch recently). I typically use rsync to keep the two ...
- 1,133
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1
answer
2k
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Different timestamps in SFTP "ls -l" vs. "ls -lh"
I have a 3rd-party SFTP server on which I want to check some file timestamps.
However, I do get different results for the same file if I use ls -l vs. ls -lh:
sftp> ls -l
[...]
-rwxrwxrwx 1 0 ...
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262
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How may i get /var/log/dnf.log to log times in my system timezone?
How may i get /var/log/dnf.log to log times in my system timezone? Neither man dnf nor google have yet enlightened me on this. Centos8/rhel8.
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How to check/set "kernel timezone" for use with iptables "time" module?
The iptables -m time module supports time-based firewall rules. By default it operates in UTC but with --kerneltz parameter it should work in "kernel timezone":
$ iptables -m time --help
...
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3
answers
1k
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When date and timedatectl?
About reporting and settings for date and time exists available the date and timedatectl commands - it according with the most common results available through the web. Practically both do the same.
...
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1
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1k
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How to know when was the last time I changed the time zone?
I changed my time zone recently but can't recall which day. Is there a way to know what is the date that I changed my time zone?
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1
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404
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Convert custom date format (GMT-08-2021.08.31-18.29.05) to epoch time
I have a date string that is supplied in the following format:
Timezone-Year.Month.Day-Hour.Minute.Second
GMT-08-2021.08.31-18.29.05
and I need to figure out how to get the date command to recognize ...
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353
views
hwclock's output is effected by DST when entering it, but not when leaving it
I set system time and RTC to the following values.
date -s 2021.08.30-09:59:30 >/dev/null 2>/dev/null //set system time
hwclock -w //sync RTC to system time
Also, /etc/TZ (which is the same ...
- 121
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votes
1
answer
802
views
/etc/localtime is not a symbolic link
According to localtime from Linux manual page:
It should be an absolute or relative symbolic link pointing to
/usr/share/zoneinfo/, followed by a timezone identifier such as
"Europe/Berlin" ...
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2
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1k
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How can I get the timezone of files and directories via terminal command?
For example, I create a file and directory in the timezone in New York.
Then I change the timezone in the system to London (UK), but still want to know which file and directory is created in which ...
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2
answers
2k
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Date and time zone offset not working correctly
I'm facing a strange behavior of date command when using time zone offset on Solaris.
>echo $TZ
MET
>date
Wed Mar 31 11:41:45 MEST 2021
>TZ=MET+24 date
Tue Mar 30 09:42:06 MET 2021
>TZ=...
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VFAT, Linux: Invalid file timestamps shown after a reboot
Just encountered a problem: when rebooting a Linux system, timestamps of all files in the mounted VFAT filesystem are shown in the incorrect timezone. It seems like a device starts thinking that its ...
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1k
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Change tmux local time
I'm working on a Linux server who is in a different time zone than me.
How can I make tmux display, in the status bar, my local time, instead of the server local time (without messing up the server ...
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2
votes
1
answer
2k
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Understanding TZ(Time Zone) variable in Unix
I was trying to find older dates using TZ="GMT+NoOfHours" date. To my surprise, it was absolutely working as expected when NoOfHours >= 0 to NoOfHours <=167(returning date older by 1-7 ...
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2
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73
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coreutils date does not return time zone when called from script
In terminal, the output of the lines
TZ="Australia/Broken_Hill" date -d '2021-4-26 09:29'
TZ="Australia/Broken_Hill" date -d '2021-4-26 09:29' +%Z
is
Mon Apr 26 09:29:00 AM ACST ...
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1
answer
2k
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What is %z useful for in GNU date?
I'm in the UK running these 2 commands (using gdate as I'm on a Mac with date (GNU coreutils) 8.32 installed):
# A UK winter date, timezone in UK at this time is GMT = UTC
$ gdate '--date=TZ="...
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69
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Why do many Web sites miscalculate my current time?
I am using Debian. My clock shows the current time. I set the BIOS to Greenwich, but then the time is adjusted to the current time zone. But when I visit many Web sites, they think I'm visiting from a ...
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158
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How to conceal my timezone in the Date entry of the headers of email messages in Mutt (NeoMutt)?
Because of privacy concerns I'd like to not expose my timezone when sending a message. When I look at locally-stored message they look something like the following:
Return-Path: <my email address&...
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1
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5k
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Not able to set time zone on ArchLinux
I would like to set my timezone to Asia/Kolkata. Here is the error I see on using timedatectl:
$ sudo timedatectl set-timezone Asia/Kolkata
Failed to set time zone: Invalid or not installed time zone '...
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1
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1k
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Convert Unix timestamp in PST to IST
I am trying to convert any Unix epoch time value into IST timezone.
Unix date:
date -d@1509872957 gives Sun Nov 5 01:09:17 PST 2017
for UTC:
date -d@1509872957 -u gives Sun Nov 5 09:09:17 UTC 2017
...
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1
answer
2k
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Why is `TZ=Asia/Kolkata date --date="1/1/1906"` invalid?
When I run:
TZ=Asia/Kolkata date --date="1/1/1906"
I get:
date: invalid date ‘1/1/1906’
Here I can find a good article on that:
Calcutta Time
But the confusion also comes from the fact ...
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1
answer
66
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Timezone: Why would someone want to set their system timezone as different from the real one?
For example, a computer in USA with a system timezone of Arctic/Longyearbyen...
What benefits does it have, if any? Also, what are the potential disadvantages of doing so?
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