Libraries not loading correctly

It's strange that in version 4 there is nothing related to libraries, don't mix with verrsion 7.x. you have to install using composer, it will install the library in vendor.
Regarding date field I think it will convert all date strings to UTC format before passing to the ical library to generate their format . I think you can customize the field's date format in the view.

Okay, that makes sense. However, the README file in the 4.x-versions is a bit misleading.

It appears that the time zone definition is not handled correctly. My site's time zone is Brussels and all meetings are formatted in Brussels timezone.

In the heading of my .ics (generated by Date iCal), the time zone is defined as follows:

TZID:Europe/Brussels
TZUNTIL:20251026T010000Z
BEGIN:STANDARD
TZNAME:CET
DTSTART:20231029T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RDATE:20241027T030000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
DTSTART:20230326T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RDATE:20240331T020000
RDATE:20250330T020000
END:DAYLIGHT
END:VTIMEZONE

However, when I chance this time zone definition to a more general apporach (using rules), I get the correct times in my calendar app:

BEGIN:VTIMEZONE 
TZID:Europe/Brussels 
X-LIC-LOCATION:Europe/Brussels 
BEGIN:DAYLIGHT 
TZOFFSETFROM:+0100 
TZOFFSETTO:+0200 
TZNAME:CEST 
DTSTART:19700329T020000 
RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU 
END:DAYLIGHT BEGIN:STANDARD 
TZOFFSETFROM:+0200 
TZOFFSETTO:+0100 
TZNAME:CET 
DTSTART:19701025T030000 
RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU 
END:STANDARD 
END:VTIMEZONE

Is this a Date iCal issure, or rather something to do with iCalcreator?

I am facing the same issue, when imported, it uses UTC instead of the local timezone.

I have tried tinkering timezone overrides with the field displays and in the view, but it doesn't fix the issue.

Drupal 10.2.4
Date iCal 4.0.6

I tried importing the above ics and added Z at the end of lines below and issues seems fixed.

DTSTART;TZID=America/Vancouver:20240406T000000Z
DTEND;TZID=America/Vancouver:20240406T010000Z

Same issue
Drupal 10.2.5
Date iCal 4.0.6

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//https://d10-dev.goodtimesdilding.com//NONSGML iCalcreator 2.41.90//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:33363336-6662-4364-b365-623266633066
X-WR-RELCALID:fd2a130b-361c-45b9-9e27-f6aaaf33e6a0
X-WR-TIMEZONE:Europe/Paris
X-WR-CALNAME:Calendrier Public
BEGIN:VTIMEZONE
TZID:Europe/Paris
TZUNTIL:20261025T010000Z
BEGIN:STANDARD
TZNAME:CET
DTSTART:20231029T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RDATE:20241027T030000
RDATE:20251026T030000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
DTSTART:20240331T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RDATE:20250330T020000
RDATE:20260329T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:787791b7-f275-4371-a6c3-fa13e6658e33
DTSTAMP:20240430T001520Z
CLASS:PUBLIC
CREATED:20240429T231643Z
DESCRIPTION:Occupé
DTSTART;TZID=Europe/Paris:20240429T220000
DTEND;TZID=Europe/Paris:20240430T220000
LAST-MODIFIED:20240429T231643Z
SEQUENCE:1
SUMMARY:Occupé
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
UID:0cb5cf8b-a2c1-46ad-babd-e0deb38827ac
DTSTAMP:20240430T001520Z
CLASS:PUBLIC
CREATED:20240429T195210Z
DESCRIPTION:Occupé
DTSTART;TZID=Europe/Paris:20240428T220000
DTEND;TZID=Europe/Paris:20240505T220000
LAST-MODIFIED:20240429T231521Z
SEQUENCE:2
SUMMARY:Occupé
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
UID:1d680695-bc16-4e35-93f5-5014f80b9764
DTSTAMP:20240430T001520Z
CLASS:PUBLIC
CREATED:20240429T232333Z
DESCRIPTION:Occupé
DTSTART;TZID=Europe/Paris:20240429T220000
DTEND;TZID=Europe/Paris:20240509T220000
LAST-MODIFIED:20240429T232551Z
SEQUENCE:3
SUMMARY:Occupé
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
UID:bbb3af71-29d7-409e-ae5f-ec027cd9c861
DTSTAMP:20240430T001520Z
CLASS:PUBLIC
CREATED:20240429T231643Z
DESCRIPTION:Occupé
DTSTART;TZID=Europe/Paris:20250124T230000
DTEND;TZID=Europe/Paris:20250429T220000
LAST-MODIFIED:20240429T231643Z
SEQUENCE:4
SUMMARY:Occupé
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR

All my events start and end at 220000 instead of 000000
2 hours diference beatween Paris & UTC

There are 2 hook
date_ical_import_vcalendar: Allow modules to alter the vcalendar object before we interpret it
date_ical_import_component: Allow modules to alter the vcalendar component before we parse it into a Feeds-compatible data array
You can alter data before icalcreator parse.

As a hotfix I changed my Site Time Zone to UTC and my events are displaying properly on all calendar, internal & iCal.

Thanks lazzyvn for the hooks' information.

Hi lazzyvn,
Can you give me more informations about the hooks and how it works to get them to use the right TimeZone ?
Thanks in advance !

@mchamps can you check Dev version, I just add 'Z' in the end of time format

Same issue
Drupal 10.2.7
Date iCal 4.0.6

I set a default time zone as Los Angeles
For Example, I was given a time from June 24, 9:00 am to 3:00 pm date range field

But I my calender it is show as

But I need to show the local timing and import same time on the calender.

Kindly any one help me do this.

@dinesh.s did you check dev version?

Yes, @lazzyvn that didn't fix my issue.

ical it check system time zone not user timezone. I checked with Outlook it works fine

What I have setup :
on my PC local timezone is set to Paris

/admin/config/regional/settings :
- Default time zone > Paris
- Users may set their own time zone > unchecked

A content with 2 Date fields
Arrival : 02/07/2024 00:00:00
Departure : 07/07/2024 00:00:00

A view, Format: iCal Feed

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//https://-.-.com//NONSGML iCalcreator 2.41.90//
CALSCALE:GREGORIAN
METHOD:PUBLISH
UID:36663133-3131-4732-b030-326537323034
X-WR-RELCALID:fd2a130b-361c-45b9-9e27-f6aaaf33e6a0
X-WR-TIMEZONE:Europe/Paris
X-WR-CALNAME:Calendrier de mon site
BEGIN:VTIMEZONE
TZID:Europe/Paris
TZUNTIL:20261025T010000Z
BEGIN:STANDARD
TZNAME:CET
DTSTART:20231029T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RDATE:20241027T030000
RDATE:20251026T030000
END:STANDARD
BEGIN:DAYLIGHT
TZNAME:CEST
DTSTART:20240331T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RDATE:20250330T020000
RDATE:20260329T020000
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:fa3a397f-629c-43c5-8b1b-5cbc7a60e7e8
DTSTAMP:20240624T233331Z
CLASS:PUBLIC
CREATED:20240613T080257Z
DESCRIPTION:Téléphone : || Arrivée : mar\, 02/07/2024 - 00:00 || Départ : d
im\, 07/07/2024 - 00:00
DTSTART;TZID=Europe/Paris:20240701T220000
DTEND;TZID=Europe/Paris:20240706T220000
LAST-MODIFIED:20240624T233325Z
LOCATION;ALTREP="https://-.-.com/fr/taxonomy/term/166"
:Menez Hom
SEQUENCE:1
SUMMARY:Déjà complet
TRANSP:OPAQUE
X-ALT-DESC;FMTTYPE=TEXT/HTML:Téléphone : || Arrivée : 07-01T22:00:00Z' class='datetime'>mar\, 02/07/2024 - 00:00 || Dépar
t : dim\, 07/07/202
4 - 00:00
END:VEVENT

On thunderbird, it displays event
Start Date Monday, 1 July 2024 22:00
End Date Saturday, 6 July 2024 22:00

On airbnb, the days are blocked
from Monday, 1 July 2024
to Friday, 5 July 2024,
the 6th is available

On my website, I use Full Calendar Display the days
from Tuesday, 2 July 2024 12:00am
to Saturday 6 July 2024
are blocked

I hope it helps. Thanks for the help !

We are having the same issue in UK. All dates are shifted by -1 hour no matter what settings. Those marked as All Day (00:00)are being displayed a day earlier at 11.00pm

That is what i test on my local
Config timezone

Field

Views

Import outlook

For me it works exactly time i want

You can debug in modules/contrib/date_ical/src/DateICal.php
Line 49 and 66.

        $date = new \DateTime($start, new \DateTimeZone('UTC'));
        $date->setTimezone($dateTimeZone);
        $start = $date->format("Y-m-d\TH:i:s");

It just takes raw value from database in UTC after set timezone by configuration and format data for ical

#20 seems to work as expected
Thank you @lazzyvn

#20 works for me too.
I had to tick Users may set their own time zone and found out my BIOS was 2 hours late 22:00 instead of 00:00
It works for Thunderbird, Views Full Calendar, AirBnB on D10.3

Thanks You @lazzyvn for your time & patience

Thank you @lazzyvn for your valuable time

If I have the date and time it is working as expected.

But if I have only the date without having any time selected
it gets the default timezone as 12:00 AM UTC and converts it into the local timezone.
Scenario: If I select July 08/07/24 - 12/07/24 It gets the default time as 12:00 AM UTC showing in the calendar as 07/07/24 to 11/07/24 at 05:00:00 PM

I set my time zone as Los Angeles

From my understanding, if you only save the date without time, in the system it saves your date and time equal to the time you save, it takes the time of system to save. You can check in the database and see. If I have free time and a customer complains about this problem, I will deepen the date at 00:00 and finish at 23:59. Currently there is no request, so you can wait in the future :).

FYI, I tested everything... again... it failed, events were all over the place

I update date_ical to latest version : 4.0.7
I fixed my issues straight away.

Thanks !

Automatically closed - issue fixed for 2 weeks with no activity.

What was the final fix for this?