Wrong timezone for Europe/Moscow

[blshadow]

Steps to reproduce

1. Set Europe/Moscow time zone on client PC
2. Create new calendar event
3. Press More..., then press time zone button

Expected behaviour

Moscow time zone is appears

Actual behaviour

Minsk time zone is appears

Server configuration

Operating system:
Gentoo Linux

Web server:
Apache 2.4.23

Database:
MariaDB 10.0.27

PHP version:
5.6.25

Server version: (see your admin page)
10.0.0

Calendar version: (see the apps page)
1.4.0

Updated from an older installed version or fresh install:
Updated from Owncloud 9.1.0

Signing status (ownCloud/Nextcloud 9.0 and above):

No errors have been found.

List of activated apps:

Enabled:
  - activity: 2.3.2
  - admin_audit: 1.0.0
  - calendar: true
  - comments: 1.0.0
  - contacts: 1.4.0.0
  - dav: 1.0.0
  - documents: 0.13.1
  - federatedfilesharing: 1.0.1
  - federation: 1.0.1
  - files: 1.5.2
  - files_accesscontrol: 1.1.2
  - files_automatedtagging: 1.1.1
  - files_external: 1.0.2
  - files_pdfviewer: 0.8.1
  - files_retention: 1.0.0
  - files_sharing: 1.0.0
  - files_texteditor: 2.1
  - files_trashbin: 1.0.0
  - files_versions: 1.3.0
  - files_videoplayer: 0.9.8
  - firstrunwizard: 1.1
  - gallery: 15.0.0
  - notifications: 0.3.0
  - password_policy: 1.0.0
  - provisioning_api: 1.0.0
  - serverinfo: 1.1.1
  - systemtags: 1.0.2
  - tasks: 0.9.3
  - templateeditor: 0.1
  - theming: 1.0.1
  - updatenotification: 1.0.1
  - workflowengine: 1.0.1
Disabled:
  - encryption
  - external
  - survey_client
  - user_external
  - user_ldap
  - user_saml

The content of config/config.php:

{
    "system": {
        "instanceid": "ocgcqtvbj5tn",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.blshadow.org.ru"
        ],
        "datadirectory": "\/var\/local\/nextcloud\/data",
        "overwrite.cli.url": "https:\/\/cloud.blshadow.org.ru",
        "dbtype": "mysql",
        "version": "9.1.0.16",
        "dbname": "nextcloud",
        "dbhost": "localhost",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "UTC",
        "installed": true,
        "appstore.experimental.enabled": true,
        "theme": "",
        "maintenance": false,
        "loglevel": 0,
        "trashbin_retention_obligation": "auto",
        "integrity.check.disabled": false,
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\Memcached",
        "memcached_servers": [
            [
                "localhost",
                11211
            ]
        ]
    },
    "apps": {
        "activity": {
            "enabled": "yes",
            "installed_version": "2.3.2",
            "types": "filesystem"
        },
        "admin_audit": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "logging"
        },
        "audioplayer": {
            "enabled": "no",
            "installed_version": "0",
            "ocsid": "174738",
            "signed": "true",
            "types": ""
        },
        "backgroundjob": {
            "lastjob": "169"
        },
        "calendar": {
            "enabled": "yes",
            "installed_version": "0",
            "ocsid": "168707",
            "signed": "true",
            "types": ""
        },
        "comments": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "logging"
        },
        "contacts": {
            "enabled": "yes",
            "installed_version": "1.4.0.0",
            "ocsid": "168708",
            "types": ""
        },
        "core": {
            "backgroundjobs_mode": "cron",
            "installedat": "1441486067.1323",
            "lastcron": "1474628414",
            "lastupdateResult": "[]",
            "lastupdatedat": "1474627505",
            "oc.integritycheck.checker": "[]",
            "public_caldav": "calendar\/share.php",
            "public_calendar": "calendar\/share.php",
            "public_documents": "documents\/public.php",
            "public_files": "files_sharing\/public.php",
            "public_gallery": "gallery\/public.php",
            "public_webdav": "dav\/appinfo\/v1\/publicwebdav.php",
            "remote_caldav": "dav\/appinfo\/v1\/caldav.php",
            "remote_calendar": "dav\/appinfo\/v1\/caldav.php",
            "remote_carddav": "dav\/appinfo\/v1\/carddav.php",
            "remote_contacts": "dav\/appinfo\/v1\/carddav.php",
            "remote_dav": "dav\/appinfo\/v2\/remote.php",
            "remote_files": "dav\/appinfo\/v1\/webdav.php",
            "remote_webdav": "dav\/appinfo\/v1\/webdav.php",
            "repairlegacystoragesdone": "yes",
            "shareapi_allow_public_notification": "yes"
        },
        "dav": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "filesystem"
        },
        "documents": {
            "enabled": "yes",
            "installed_version": "0.13.1",
            "ocsid": "168711",
            "types": ""
        },
        "federatedfilesharing": {
            "enabled": "yes",
            "installed_version": "1.0.1",
            "types": ""
        },
        "federation": {
            "enabled": "yes",
            "installed_version": "1.0.1",
            "types": "authentication"
        },
        "files": {
            "cronjob_scan_files": "500",
            "enabled": "yes",
            "installed_version": "1.5.2",
            "types": "filesystem"
        },
        "files_accesscontrol": {
            "enabled": "yes",
            "installed_version": "1.1.2",
            "types": "filesystem"
        },
        "files_automatedtagging": {
            "enabled": "yes",
            "installed_version": "1.1.1",
            "types": "filesystem"
        },
        "files_external": {
            "enabled": "yes",
            "installed_version": "1.0.2",
            "ocsid": "166048",
            "types": "filesystem",
            "user_mounting_backends": "ftp,dav,owncloud,sftp,amazons3,dropbox,googledrive,swift,smb,\\OC\\Files\\Storage\\SFTP_Key,\\OC\\Files\\Storage\\SMB_OC"
        },
        "files_locking": {
            "enabled": "no",
            "installed_version": "",
            "types": "filesystem"
        },
        "files_pdfviewer": {
            "enabled": "yes",
            "installed_version": "0.8.1",
            "ocsid": "166049",
            "types": ""
        },
        "files_reader": {
            "enabled": "no",
            "installed_version": "0.7.2",
            "ocsid": "167127",
            "types": ""
        },
        "files_retention": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "filesystem"
        },
        "files_sharing": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "filesystem"
        },
        "files_texteditor": {
            "enabled": "yes",
            "installed_version": "2.1",
            "ocsid": "166051",
            "types": ""
        },
        "files_trashbin": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "filesystem"
        },
        "files_versions": {
            "enabled": "yes",
            "installed_version": "1.3.0",
            "types": "filesystem"
        },
        "files_videoplayer": {
            "enabled": "yes",
            "installed_version": "0.9.8",
            "types": ""
        },
        "files_videoviewer": {
            "enabled": "no",
            "installed_version": "0.1.3",
            "ocsid": "166054",
            "types": ""
        },
        "firstrunwizard": {
            "enabled": "yes",
            "installed_version": "1.1",
            "ocsid": "166055",
            "types": ""
        },
        "gallery": {
            "enabled": "yes",
            "installed_version": "15.0.0",
            "types": ""
        },
        "galleryplus": {
            "enabled": "no",
            "installed_version": "15.0.0",
            "ocsid": "169116",
            "types": ""
        },
        "html5_videoplayer": {
            "enabled": "no",
            "installed_version": "1.0",
            "ocsid": "173950",
            "types": ""
        },
        "mail": {
            "enabled": "no",
            "installed_version": "0.5.2",
            "ocsid": "169914",
            "signed": "true",
            "types": ""
        },
        "music": {
            "enabled": "no",
            "installed_version": "0",
            "ocsid": "164319",
            "types": "filesystem"
        },
        "notifications": {
            "enabled": "yes",
            "installed_version": "0.3.0",
            "types": "logging"
        },
        "ocsms": {
            "enabled": "no",
            "installed_version": "1.8.0",
            "ocsid": "167289",
            "types": ""
        },
        "ojsxc": {
            "enabled": "no",
            "installed_version": "3.0.0",
            "ocsid": "162257",
            "types": "prelogin"
        },
        "password_policy": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": ""
        },
        "provisioning_api": {
            "enabled": "yes",
            "installed_version": "1.0.0",
            "types": "prevent_group_restriction"
        },
        "roundcube": {
            "autoLogin": "",
            "enableDebug": "",
            "enabled": "no",
            "installed_version": "2.7.0",
            "maildir": "\/",
            "ocsid": "151523",
            "rcHost": "",
            "rcInternalAddress": "",
            "rcPort": "",
            "rcRefreshInterval": "60",
            "removeControlNav": "",
            "removeHeaderNav": "",
            "types": ""
        },
        "serverinfo": {
            "enabled": "yes",
            "installed_version": "1.1.1",
            "types": ""
        },
        "survey_client": {
            "apps": "no",
            "database": "no",
            "enabled": "no",
            "encryption": "no",
            "files_sharing": "no",
            "installed_version": "0.1.5",
            "php": "no",
            "server": "no",
            "stats": "no",
            "types": ""
        },
        "systemtags": {
            "enabled": "yes",
            "installed_version": "1.0.2",
            "types": "logging"
        },
        "tasks": {
            "enabled": "yes",
            "installed_version": "0.9.3",
            "ocsid": "164356",
            "signed": "true",
            "types": ""
        },
        "templateeditor": {
            "enabled": "yes",
            "installed_version": "0.1",
            "types": ""
        },
        "theming": {
            "cachebuster": "2",
            "enabled": "yes",
            "installed_version": "1.0.1",
            "types": "logging"
        },
        "updatenotification": {
            "calendar": "1.4.0",
            "contacts": "1.4.0.0",
            "enabled": "yes",
            "installed_version": "1.0.1",
            "tasks": "0.9.3",
            "types": ""
        },
        "updater": {
            "enabled": "no",
            "installed_version": "0.6",
            "types": ""
        },
        "workflowengine": {
            "enabled": "yes",
            "installed_version": "1.0.1",
            "types": "filesystem"
        }
    }
}

Are you using external storage, if yes which one: local/smb/sftp/...
no

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser:
google-chrome 53.0.2785.116

Operating system:
Gentoo Linux

CalDAV-clients:
https://play.google.com/store/apps/details?id=org.dmfs.caldav.lib

Logs

Web server error log

Insert your webserver log here

Log file (data/owncloud.log)

Insert your ownCloud.log file here

Browser log

Output from browser console in the calendar page:
jstz.determine().name()
"Europe/Minsk"

To fix this, I updated the jstz.js from here: https://bitbucket.org/pellepim/jstimezonedetect/src
then I changed EUROPE-MOSCOW.ics (because the correct offset for the Moscow is UTC+3, but not UTC+4):
BEGIN:VTIMEZONE
TZID:Europe/Moscow
X-LIC-LOCATION:Europe/Moscow
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0300
TZNAME:MSK
DTSTART:19700101T000000
END:STANDARD
END:VTIMEZONE
After to do this all works fine.

I discovered that another copies of jstz.js also used in another places of nextcloud, and also needs to update.

[georgehrke]

To fix this, I updated the jstz.js from here: https://bitbucket.org/pellepim/jstimezonedetect/src

Can you please a bug report upstream?

[blshadow]

Can you please a bug report upstream?

But the problem is not persistant in the upstream. The problem arises from the fact that nextcloud uses old version of the jstz.js library.

As a result, you need to fix 2 things:

1. update jstz.js to the actual version
2. fix timezones/EUROPE-MOSCOW.ics (and maybe others) to the actual time zone offset

[georgehrke]

1. update jstz.js to the actual version

We are using 1.0.6, which happens to be the latest release.
https://github.com/nextcloud/calendar/blob/master/js/bower.json#L7
https://bitbucket.org/pellepim/jstimezonedetect/src/6c427658686c664da52c6a87cd62ec910baab276/package.json?at=default&fileviewer=file-view-default

1. fix timezones/EUROPE-MOSCOW.ics (and maybe others) to the actual time zone offset

Did the timezone for moscow change recently?

[tcitworld]

We are using 1.0.6, which happens to be the latest release.

NextCloud server gives 1.0.5 though.

[georgehrke]

That's a bloody packing issue in https://github.com/HenningM/jstimezonedetect
for christs sake ...

[blshadow]

We are using 1.0.6, which happens to be the latest release.

I got it. I was talking about the 1.4.0 version of Calendar app that uses 1.0.5 version of jstz. Sorry, if this is already fixed.

Did the timezone for moscow change recently?

In the 2014...

[blshadow]

You can look the actual russian time zones at wikipedia: https://en.wikipedia.org/wiki/Time_in_Russia
Not only Moscow time changed in 2014.

[blshadow]

I checked another russian time zones:

Time zone file          Current time zone   Actual time zone
                        (in calendar app)
EUROPE-KALININGRAD.ics  UTC+3               UTC+2
EUROPE-MOSCOW.ics       UTC+4               UTC+3
EUROPE-SAMARA.ics       UTC+4               UTC+4
ASIA-YEKATERINBURG.ics  UTC+6               UTC+5
ASIA-OMSK.ics           UTC+7               UTC+6
ASIA-KRASNOYARSK.ics    UTC+8               UTC+7
ASIA-IRKUTSK.ics        UTC+9               UTC+8
ASIA-YAKUTSK.ics        UTC+10              UTC+9
ASIA-VLADIVOSTOK.ics    UTC+11              UTC+10
ASIA-MAGADAN.ics        UTC+12              UTC+11
ASIA-KAMCHATKA.ics      UTC+12              UTC+12

[georgehrke]

1. fix timezones/EUROPE-MOSCOW.ics (and maybe others) to the actual time zone offset

It's not that easy. If we replaced the offset as it is, events before 2014 would be displayed incorrectly.
We need to regenerate the VTimezone file