diff --git a/src/test/resources/samples/valid/Casablanca.ics b/src/test/resources/samples/valid/Casablanca.ics
new file mode 100644
index 000000000..79103ff74
--- /dev/null
+++ b/src/test/resources/samples/valid/Casablanca.ics
@@ -0,0 +1,247 @@
+BEGIN:VCALENDAR
+PRODID:-//tzurl.org//NONSGML Olson 2020b//EN
+VERSION:2.0
+BEGIN:VTIMEZONE
+TZID:Africa/Casablanca
+TZUNTIL:20870511T020001Z
+LAST-MODIFIED:20201010T011803Z
+TZURL:http://tzurl.org/zoneinfo/Africa/Casablanca
+X-LIC-LOCATION:Africa/Casablanca
+X-PROLEPTIC-TZNAME:LMT
+BEGIN:STANDARD
+TZNAME:+00
+TZOFFSETFROM:-003020
+TZOFFSETTO:+0000
+DTSTART:19131026T000000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:19390912T000000
+RDATE:19400225T000000
+RDATE:19500611T000000
+RDATE:19670603T120000
+RDATE:19740624T000000
+RDATE:19780601T000000
+RDATE:20100502T000000
+RDATE:20110403T000000
+RDATE:20120820T020000
+RDATE:20130810T020000
+RDATE:20140802T020000
+RDATE:20150719T020000
+RDATE:20160710T020000
+RDATE:20170702T020000
+RDATE:20180617T020000
+RDATE:20190609T020000
+RDATE:20200531T020000
+RDATE:20210516T020000
+RDATE:20220508T020000
+RDATE:20230430T020000
+RDATE:20240414T020000
+RDATE:20250406T020000
+RDATE:20260322T020000
+RDATE:20270314T020000
+RDATE:20280305T020000
+RDATE:20290218T020000
+RDATE:20300210T020000
+RDATE:20310202T020000
+RDATE:20320118T020000
+RDATE:20330109T020000
+RDATE:20331225T020000
+RDATE:20341217T020000
+RDATE:20351209T020000
+RDATE:20361123T020000
+RDATE:20371115T020000
+RDATE:20381107T020000
+RDATE:20391023T020000
+RDATE:20401014T020000
+RDATE:20410929T020000
+RDATE:20420921T020000
+RDATE:20430913T020000
+RDATE:20440828T020000
+RDATE:20450820T020000
+RDATE:20460812T020000
+RDATE:20470728T020000
+RDATE:20480719T020000
+RDATE:20490704T020000
+RDATE:20500626T020000
+RDATE:20510618T020000
+RDATE:20520602T020000
+RDATE:20530525T020000
+RDATE:20540517T020000
+RDATE:20550502T020000
+RDATE:20560423T020000
+RDATE:20570408T020000
+RDATE:20580331T020000
+RDATE:20590323T020000
+RDATE:20600307T020000
+RDATE:20610227T020000
+RDATE:20620219T020000
+RDATE:20630204T020000
+RDATE:20640127T020000
+RDATE:20650111T020000
+RDATE:20660103T020000
+RDATE:20661226T020000
+RDATE:20671211T020000
+RDATE:20681202T020000
+RDATE:20691124T020000
+RDATE:20701109T020000
+RDATE:20711101T020000
+RDATE:20721016T020000
+RDATE:20731008T020000
+RDATE:20740930T020000
+RDATE:20750915T020000
+RDATE:20760906T020000
+RDATE:20770829T020000
+RDATE:20780814T020000
+RDATE:20790806T020000
+RDATE:20800721T020000
+RDATE:20810713T020000
+RDATE:20820705T020000
+RDATE:20830620T020000
+RDATE:20840611T020000
+RDATE:20850603T020000
+RDATE:20860519T020000
+RDATE:20870511T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:+00
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0000
+DTSTART:19391119T000000
+RDATE:19451118T000000
+RDATE:19501029T000000
+RDATE:19671001T000000
+RDATE:19740901T000000
+RDATE:19760801T000000
+RDATE:19770928T000000
+RDATE:19780804T000000
+RDATE:19860101T000000
+RDATE:20080901T000000
+RDATE:20090821T000000
+RDATE:20100808T000000
+RDATE:20110731T000000
+RDATE:20120720T030000
+RDATE:20120930T030000
+RDATE:20130707T030000
+RDATE:20140628T030000
+RDATE:20150614T030000
+RDATE:20160605T030000
+RDATE:20170521T030000
+RDATE:20180513T030000
+RDATE:20190505T030000
+RDATE:20200419T030000
+RDATE:20210411T030000
+RDATE:20220327T030000
+RDATE:20230319T030000
+RDATE:20240310T030000
+RDATE:20250223T030000
+RDATE:20260215T030000
+RDATE:20270207T030000
+RDATE:20280123T030000
+RDATE:20290114T030000
+RDATE:20291230T030000
+RDATE:20301222T030000
+RDATE:20311214T030000
+RDATE:20321128T030000
+RDATE:20331120T030000
+RDATE:20341105T030000
+RDATE:20351028T030000
+RDATE:20361019T030000
+RDATE:20371004T030000
+RDATE:20380926T030000
+RDATE:20390918T030000
+RDATE:20400902T030000
+RDATE:20410825T030000
+RDATE:20420810T030000
+RDATE:20430802T030000
+RDATE:20440724T030000
+RDATE:20450709T030000
+RDATE:20460701T030000
+RDATE:20470623T030000
+RDATE:20480607T030000
+RDATE:20490530T030000
+RDATE:20500515T030000
+RDATE:20510507T030000
+RDATE:20520428T030000
+RDATE:20530413T030000
+RDATE:20540405T030000
+RDATE:20550328T030000
+RDATE:20560312T030000
+RDATE:20570304T030000
+RDATE:20580217T030000
+RDATE:20590209T030000
+RDATE:20600201T030000
+RDATE:20610116T030000
+RDATE:20620108T030000
+RDATE:20621231T030000
+RDATE:20631216T030000
+RDATE:20641207T030000
+RDATE:20651122T030000
+RDATE:20661114T030000
+RDATE:20671106T030000
+RDATE:20681021T030000
+RDATE:20691013T030000
+RDATE:20701005T030000
+RDATE:20710920T030000
+RDATE:20720911T030000
+RDATE:20730827T030000
+RDATE:20740819T030000
+RDATE:20750811T030000
+RDATE:20760726T030000
+RDATE:20770718T030000
+RDATE:20780710T030000
+RDATE:20790625T030000
+RDATE:20800616T030000
+RDATE:20810601T030000
+RDATE:20820524T030000
+RDATE:20830516T030000
+RDATE:20840430T030000
+RDATE:20850422T030000
+RDATE:20860414T030000
+RDATE:20870330T030000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:19760501T000000
+RRULE:FREQ=YEARLY;UNTIL=19770501T000000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:19840316T000000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:20080601T000000
+RRULE:FREQ=YEARLY;UNTIL=20090601T000000Z
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:20120429T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=20130428T020000Z
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:+00
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0000
+DTSTART:20131027T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=20171029T020000Z
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:+01
+TZOFFSETFROM:+0000
+TZOFFSETTO:+0100
+DTSTART:20140330T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU;UNTIL=20180325T020000Z
+END:DAYLIGHT
+END:VTIMEZONE
+END:VCALENDAR