Timezone and recurring events issues

Hello! Love both, this and the booking manager plugin. They were exactly what we’re looking for. But I noticed a few issues (or limitations?) while trying to get the free version running on our site.

1. The time of imported events from an Outlook365 shared calendar is always off by two hours. In the HTML view of the shared calendar, the events have the correct time. But as soon as they’re imported, they are all shown as original time + 2 hours. The WordPress site has it’s timezone set to Europe/Berlin. The same is done in synchronization setting of WP booking calendar. In the settings for “Date and Time Formats”, it’s showing the timezone of the server as UTC, WordPress timezone as Europe/Berlin. Am I missing something here, or is this a bug? As far as I know users don’t have any control over the output formatting of an Outlook calendar. Here is an example event from the ICS. In Outlook, it’s shown as 11:00 to 12:00 – which is correct. In WP booking calendar, it’s shown as 13:00 to 14:00.

BEGIN:VEVENT
UID:040000008200E00074C5B7101A82E00800000000DE271269F326DC01000000000000000
 010000000B531024AEAB38144A3A7F436C948665A
SUMMARY:Gebucht
DTSTART;TZID=W. Europe Standard Time:20251006T110000
DTEND;TZID=W. Europe Standard Time:20251006T120000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20251002T103857Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:0
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-BUSYSTATUS:BUSY
X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
X-MICROSOFT-CDO-IMPORTANCE:1
X-MICROSOFT-CDO-INSTTYPE:0
X-MICROSOFT-DONOTFORWARDMEETING:FALSE
X-MICROSOFT-DISALLOW-COUNTER:FALSE
X-MICROSOFT-REQUESTEDATTENDANCEMODE:DEFAULT
X-MICROSOFT-ISRESPONSEREQUESTED:FALSE
END:VEVENT

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2. Some recurring events seem to be imported / handled as one continuous event from start date time to end of occurrence date / time, instead of treating them as a daily 9:00 to 11:00 event – thus blocking all time slots on each day of the occurrence.

BEGIN:VEVENT
RRULE:FREQ=WEEKLY;UNTIL=20251231T080000Z;INTERVAL=1;BYDAY=MO,TU,WE,TH,FR;WK
 ST=SU
UID:040000008200E00074C5B7101A82E008000000008858E90C786DDB01000000000000000
 010000000F32FDBA8817B1247AF563E4C688F4D83
SUMMARY:Gebucht
DTSTART;TZID=W. Europe Standard Time:20250127T090000
DTEND;TZID=W. Europe Standard Time:20250127T110000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20251002T103857Z
TRANSP:OPAQUE
STATUS:CONFIRMED
X-MICROSOFT-CDO-BUSYSTATUS:BUSY
X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
X-MICROSOFT-CDO-IMPORTANCE:1
X-MICROSOFT-CDO-INSTTYPE:1
X-MICROSOFT-DONOTFORWARDMEETING:FALSE
X-MICROSOFT-DISALLOW-COUNTER:FALSE
X-MICROSOFT-REQUESTEDATTENDANCEMODE:DEFAULT
X-MICROSOFT-ISRESPONSEREQUESTED:FALSE
END:VEVENT

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Other recurring events are blocking time slots / the whole day despite being set as “available” in Outlook. Example:

BEGIN:VEVENT
UID:040000008200E00074C5B7101A82E00800000000B3C11895CAC0DB01000000000000000
 01000000093AFACA27B9EF24B8B107F23E38DF11A
SUMMARY:Frei
DTSTART;VALUE=DATE:20251010
DTEND;VALUE=DATE:20251013
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20251002T103857Z
TRANSP:TRANSPARENT
STATUS:CONFIRMED
SEQUENCE:0
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-BUSYSTATUS:FREE
X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
X-MICROSOFT-CDO-ALLDAYEVENT:TRUE
X-MICROSOFT-CDO-IMPORTANCE:1
X-MICROSOFT-CDO-INSTTYPE:0
X-MICROSOFT-DONOTFORWARDMEETING:FALSE
X-MICROSOFT-DISALLOW-COUNTER:FALSE
X-MICROSOFT-REQUESTEDATTENDANCEMODE:DEFAULT
X-MICROSOFT-ISRESPONSEREQUESTED:FALSE
END:VEVENT

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== Server Environment ==
	Operating System: Linux
	Software: Apache
	MySQL version: mariadb.org binary distribution v11.7.2-MariaDB-ubu2004
	PHP Version: 8.2.29
	PHP Memory Limit: 8G
	PHP Max Input Vars: 1000
	PHP Max Post Size: 120M
	GD Installed: Yes
	ZIP Installed: Yes
	Write Permissions: All right
	Elementor Library: Connected

== WordPress Environment ==
	Version: 6.8.3
	Site URL: https://xwd.x22889.de
	Home URL: https://xwd.x22889.de
	WP Multisite: No
	Max Upload Size: 120 MB
	Memory limit: 40M
	Max Memory limit: 8G
	Permalink Structure: /%postname%/
	Language: de_DE
	Timezone: Europe/Berlin
	Admin Email: [email protected]
	Debug Mode: Inactive

== Theme ==
	Name: OceanWP Child Theme
	Version: 1.0
	Author: OceanWP
	Child Theme: Yes
	Parent Theme Name: OceanWP
	Parent Theme Version: 4.1.3
	Parent Theme Author: OceanWP

== User ==
	Role: administrator
	WP Profile lang: de
	User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36

== Active Plugins ==
	Booking Calendar
		Version: 10.14.6
		Author: wpdevelop, oplugins

	Booking Manager
		Version: 2.1.16
		Author: wpdevelop, oplugins

	Elementor
		Version: 3.32.2
		Author: Elementor.com

	Limit Login Attempts Reloaded
		Version: 2.26.23
		Author: Limit Login Attempts Reloaded

	Ocean Extra
		Version: 2.5.1
		Author: OceanWP

	Real Cookie Banner (Free)
		Version: 5.2.4
		Author: devowl.io

	UpdraftPlus - Backup/Restore
		Version: 1.25.7
		Author: TeamUpdraft, DavidAnderson

	WebP Express
		Version: 0.25.9
		Author: Bjørn Rosell

	WPForms Lite
		Version: 1.9.7.3
		Author: WPForms

	Yoast SEO
		Version: 26.0
		Author: Team Yoast
				

Imported .ICS from Outlook365: https://pastebin.com/uhwaX618
Exported .ICS from WP booking manager: https://pastebin.com/PDWB9nJx

Could you please shed some light into these issues? Do you need additional details to debug this?

Thanks
Stefan