diff --git a/src/icalendar/fuzzing/corpus/america_new_york.ics b/src/icalendar/fuzzing/corpus/america_new_york.ics
new file mode 100644
index 00000000..b6812eeb
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/america_new_york.ics
@@ -0,0 +1,61 @@
+BEGIN:VCALENDAR
+BEGIN:VTIMEZONE
+TZID:custom_America/New_York
+LAST-MODIFIED:20050809T050000Z
+BEGIN:DAYLIGHT
+DTSTART:19670430T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19730429T070000Z
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+TZNAME:EDT
+END:DAYLIGHT
+BEGIN:STANDARD
+DTSTART:19671029T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU;UNTIL=20061029T060000Z
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+TZNAME:EST
+END:STANDARD
+BEGIN:DAYLIGHT
+DTSTART:19740106T020000
+RDATE:19750223T020000
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+TZNAME:EDT
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+DTSTART:19760425T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=-1SU;UNTIL=19860427T070000Z
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+TZNAME:EDT
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+DTSTART:19870405T020000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU;UNTIL=20060402T070000Z
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+TZNAME:EDT
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+DTSTART:20070311T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU
+TZOFFSETFROM:-0500
+TZOFFSETTO:-0400
+TZNAME:EDT
+END:DAYLIGHT
+BEGIN:STANDARD
+DTSTART:20071104T020000
+RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU
+TZOFFSETFROM:-0400
+TZOFFSETTO:-0500
+TZNAME:EST
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+UID:noend123
+DTSTART;TZID=custom_America/New_York;VALUE=DATE-TIME:20140829T080000
+DTSTART;TZID=custom_America/New_York;VALUE=DATE-TIME:20140829T100000
+SUMMARY:an event with a custom tz name
+END:VEVENT
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/calendar_with_unicode.ics b/src/icalendar/fuzzing/corpus/calendar_with_unicode.ics
new file mode 100644
index 00000000..e5e2f416
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/calendar_with_unicode.ics
@@ -0,0 +1,7 @@
+BEGIN:VCALENDAR
+PRODID:-//Plönë.org//NONSGML plone.app.event//EN
+VERSION:2.0
+X-WR-CALNAME:äöü ÄÖÜ €
+X-WR-CALDESC:test non ascii: äöü ÄÖÜ €
+X-WR-RELCALID:12345
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/event_with_escaped_character1.ics b/src/icalendar/fuzzing/corpus/event_with_escaped_character1.ics
new file mode 100644
index 00000000..d082b9fb
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_escaped_character1.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN=Society\, 2014:that
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_escaped_character2.ics b/src/icalendar/fuzzing/corpus/event_with_escaped_character2.ics
new file mode 100644
index 00000000..88b849d2
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_escaped_character2.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN=Society\\ 2014:that
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_escaped_character3.ics b/src/icalendar/fuzzing/corpus/event_with_escaped_character3.ics
new file mode 100644
index 00000000..3c657c4f
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_escaped_character3.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN=Society\; 2014:that
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_escaped_character4.ics b/src/icalendar/fuzzing/corpus/event_with_escaped_character4.ics
new file mode 100644
index 00000000..037c1c43
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_escaped_character4.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN=Society\: 2014:that
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_escaped_characters.ics b/src/icalendar/fuzzing/corpus/event_with_escaped_characters.ics
new file mode 100644
index 00000000..c9671d12
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_escaped_characters.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN=that\, that\; %th%%at%\ that\::это\, то\; that\ %th%%at%\:
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_recurrence.ics b/src/icalendar/fuzzing/corpus/event_with_recurrence.ics
new file mode 100644
index 00000000..c2dd1825
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_recurrence.ics
@@ -0,0 +1,7 @@
+BEGIN:VEVENT
+DTSTART:19960401T010000
+DTEND:19960401T020000
+RRULE:FREQ=DAILY;COUNT=100
+EXDATE:19960402T010000Z,19960403T010000Z,19960404T010000Z
+SUMMARY:A recurring event with exdates
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_recurrence_exdates_on_different_lines.ics b/src/icalendar/fuzzing/corpus/event_with_recurrence_exdates_on_different_lines.ics
new file mode 100644
index 00000000..8f329d75
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_recurrence_exdates_on_different_lines.ics
@@ -0,0 +1,12 @@
+BEGIN:VEVENT
+DTSTART;TZID=Europe/Vienna:20120327T100000
+DTEND;TZID=Europe/Vienna:20120327T180000
+RRULE:FREQ=WEEKLY;UNTIL=20120703T080000Z;BYDAY=TU
+EXDATE;TZID=Europe/Vienna:20120529T100000
+EXDATE;TZID=Europe/Vienna:20120403T100000
+EXDATE;TZID=Europe/Vienna:20120410T100000
+EXDATE;TZID=Europe/Vienna:20120501T100000
+EXDATE;TZID=Europe/Vienna:20120417T100000
+DTSTAMP:20130716T120638Z
+SUMMARY:A Recurring event with multiple exdates, one per line.
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_rsvp.ics b/src/icalendar/fuzzing/corpus/event_with_rsvp.ics
new file mode 100644
index 00000000..01963d5b
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_rsvp.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ATTENDEE;RSVP=TRUE:mailto:someone@example.com
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_unicode_fields.ics b/src/icalendar/fuzzing/corpus/event_with_unicode_fields.ics
new file mode 100644
index 00000000..037e5054
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_unicode_fields.ics
@@ -0,0 +1,9 @@
+BEGIN:VEVENT
+DTSTART:20101010T100000Z
+DTEND:20101010T120000Z
+CREATED:20101010T100000Z
+UID:123456
+SUMMARY:Non-ASCII Test: ÄÖÜ äöü €
+DESCRIPTION:icalendar should be able to handle non-ascii: €äüöÄÜÖ.
+LOCATION:Tribstrül
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/event_with_unicode_organizer.ics b/src/icalendar/fuzzing/corpus/event_with_unicode_organizer.ics
new file mode 100644
index 00000000..2fb3be1f
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/event_with_unicode_organizer.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ORGANIZER;CN="Джон Доу":mailto:john.doe@example.org
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_100_transformed_doctests_into_unittests.ics b/src/icalendar/fuzzing/corpus/issue_100_transformed_doctests_into_unittests.ics
new file mode 100644
index 00000000..803f5670
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_100_transformed_doctests_into_unittests.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT

+SUMMARY;LANGUAGE=ru:te

+END:VEVENT

diff --git a/src/icalendar/fuzzing/corpus/issue_101_icalendar_chokes_on_umlauts_in_organizer.ics b/src/icalendar/fuzzing/corpus/issue_101_icalendar_chokes_on_umlauts_in_organizer.ics
new file mode 100644
index 00000000..27a6d097
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_101_icalendar_chokes_on_umlauts_in_organizer.ics
@@ -0,0 +1,14 @@
+BEGIN:VEVENT
+SUMMARY:wichtiger termin 1
+DTSTART:20130416T100000Z
+DTEND:20130416T110000Z
+DTSTAMP:20130416T092616Z
+UID:20130416112341.10064jz0k4j7uem8@acmenet.de
+CLASS:PUBLIC
+CREATED:20130416T092341Z
+LAST-MODIFIED:20130416T092341Z
+LOCATION:im büro
+ORGANIZER;CN="acme, ädmin":mailto:adm-acme@mydomain.de
+STATUS:CONFIRMED
+TRANSP:OPAQUE
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_104_mark_events_broken.ics b/src/icalendar/fuzzing/corpus/issue_104_mark_events_broken.ics
new file mode 100644
index 00000000..a3ecea2f
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_104_mark_events_broken.ics
@@ -0,0 +1,10 @@
+BEGIN:VEVENT
+DTSTART:20140401T000000Z
+DTEND:20140401T010000Z
+DTSTAMP:20140401T000000Z
+SUMMARY:Broken Eevnt
+CLASS:PUBLIC
+STATUS:CONFIRMED
+TRANSP:OPAQUE
+X
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_112_missing_tzinfo_on_exdate.ics b/src/icalendar/fuzzing/corpus/issue_112_missing_tzinfo_on_exdate.ics
new file mode 100644
index 00000000..7363ab0e
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_112_missing_tzinfo_on_exdate.ics
@@ -0,0 +1,20 @@
+BEGIN:VEVENT
+DTSTART;TZID=America/New_York:20130907T120000
+DTEND;TZID=America/New_York:20130907T170000
+RRULE:FREQ=WEEKLY;BYDAY=FR,SA;UNTIL=20131025T035959Z
+EXDATE;TZID=America/New_York:20131012T120000
+EXDATE;TZID=America/New_York:20131011T120000
+DTSTAMP:20131021T025552Z
+UID:ak30b02u7858q1oo6ji9dm4mgg@google.com
+CREATED:20130903T181453Z
+DESCRIPTION:The Fieldhouse and Hard Rock Cafe are working with PhillyRising
+  to provide live entertainment on Friday and Saturday afternoons throughout
+  the Summer.
+LAST-MODIFIED:20131015T210927Z
+LOCATION:12th and Market Streets (weather permitting)
+SEQUENCE:0
+STATUS:CONFIRMED
+SUMMARY:Market East Live!
+TRANSP:OPAQUE
+END:VEVENT
+
diff --git a/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD.ics b/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD.ics
new file mode 100644
index 00000000..398859c4
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD.ics
@@ -0,0 +1,7 @@
+BEGIN:VEVENT
+SUMMARY:RDATE period
+DTSTART:19961230T020000Z
+DTEND:19961230T060000Z
+UID:rdate_period
+RDATE;VALUE=PERIOD:19970101T180000Z/19970102T070000Z
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD_list.ics b/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD_list.ics
new file mode 100644
index 00000000..3202e854
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_156_RDATE_with_PERIOD_list.ics
@@ -0,0 +1,8 @@
+BEGIN:VEVENT
+SUMMARY:RDATE period
+DTSTART:19961230T020000Z
+DTEND:19961230T060000Z
+UID:rdate_period
+RDATE;VALUE=PERIOD:19970101T180000Z/19970102T070000Z,19970109T180000Z/PT5H
+ 30M
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_157_removes_trailing_semicolon.ics b/src/icalendar/fuzzing/corpus/issue_157_removes_trailing_semicolon.ics
new file mode 100644
index 00000000..766b56fb
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_157_removes_trailing_semicolon.ics
@@ -0,0 +1,4 @@
+BEGIN:VEVENT
+DTSTART:20150325T101010
+RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU;
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_184_broken_representation_of_period.ics b/src/icalendar/fuzzing/corpus/issue_184_broken_representation_of_period.ics
new file mode 100644
index 00000000..8b6ed138
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_184_broken_representation_of_period.ics
@@ -0,0 +1,6 @@
+BEGIN:VEVENT
+DTSTART:20150219T133000
+DTSTAMP:20150219T133000
+UID:1234567
+RDATE;VALUE=PERIOD:20150219T133000/PT10H
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_464_invalid_rdate.ics b/src/icalendar/fuzzing/corpus/issue_464_invalid_rdate.ics
new file mode 100644
index 00000000..f4e587d9
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_464_invalid_rdate.ics
@@ -0,0 +1,7 @@
+BEGIN:VEVENT
+SUMMARY:RDATE period
+DTSTART:19961230T020000Z
+DTEND:19961230T060000Z
+UID:rdate_period
+RDATE;VALUE=PERIOD:19970101T180000Z/19970102T070000Z,199709T180000Z/PT5H30M
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_53_description_parsed_properly.ics b/src/icalendar/fuzzing/corpus/issue_53_description_parsed_properly.ics
new file mode 100644
index 00000000..9edc183c
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_53_description_parsed_properly.ics
@@ -0,0 +1,19 @@
+BEGIN:VEVENT
+DTSTAMP:20120605T003759Z
+DTSTART;TZID=America/New_York:20120712T183000
+DTEND;TZID=America/New_York:20120712T213000
+STATUS:CONFIRMED
+SUMMARY:DevOps DC Meetup
+DESCRIPTION:DevOpsDC\nThursday\, July 12 at 6:30 PM\n\nThis will be a joi
+ nt meetup / hack night with the DC jQuery Users Group.   The idea behind
+  the hack night:  Small teams consisting of at least 1 member...\n\nDeta
+ ils: http://www.meetup.com/DevOpsDC/events/47635522/
+CLASS:PUBLIC
+CREATED:20120111T120339Z
+GEO:38.90;-77.01
+LOCATION:Fathom Creative\, Inc. (1333 14th Street Northwest\, Washington
+ D.C.\, DC 20005)
+URL:http://www.meetup.com/DevOpsDC/events/47635522/
+LAST-MODIFIED:20120522T174406Z
+UID:event_qtkfrcyqkbnb@meetup.com
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_64_event_with_ascii_summary.ics b/src/icalendar/fuzzing/corpus/issue_64_event_with_ascii_summary.ics
new file mode 100644
index 00000000..e7cdbf45
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_64_event_with_ascii_summary.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+SUMMARY:abcdef
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_64_event_with_non_ascii_summary.ics b/src/icalendar/fuzzing/corpus/issue_64_event_with_non_ascii_summary.ics
new file mode 100644
index 00000000..bed239a2
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_64_event_with_non_ascii_summary.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+SUMMARY:åäö
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/issue_70_rrule_causes_attribute_error.ics b/src/icalendar/fuzzing/corpus/issue_70_rrule_causes_attribute_error.ics
new file mode 100644
index 00000000..1e062e41
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_70_rrule_causes_attribute_error.ics
@@ -0,0 +1,12 @@
+BEGIN:VEVENT
+CREATED:20081114T072804Z
+UID:D449CA84-00A3-4E55-83E1-34B58268853B
+DTEND:20070220T180000
+RRULE:FREQ=WEEKLY;INTERVAL=1;UNTIL=20070619T225959
+TRANSP:OPAQUE
+SUMMARY:Esb mellon phone conf
+DTSTART:20070220T170000
+DTSTAMP:20070221T095412Z
+SEQUENCE:0
+END:VEVENT
+
diff --git a/src/icalendar/fuzzing/corpus/issue_82_expected_output.ics b/src/icalendar/fuzzing/corpus/issue_82_expected_output.ics
new file mode 100644
index 00000000..61872f6e
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/issue_82_expected_output.ics
@@ -0,0 +1,3 @@
+BEGIN:VEVENT
+ATTACH;ENCODING=BASE64;FMTTYPE=text/plain;VALUE=BINARY:dGV4dA==
+END:VEVENT
diff --git a/src/icalendar/fuzzing/corpus/pacific_fiji.ics b/src/icalendar/fuzzing/corpus/pacific_fiji.ics
new file mode 100644
index 00000000..0e231e0a
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/pacific_fiji.ics
@@ -0,0 +1,52 @@
+BEGIN:VCALENDAR
+PRODID:-//tzurl.org//NONSGML Olson 2014g//EN
+VERSION:2.0
+BEGIN:VTIMEZONE
+TZID:custom_Pacific/Fiji
+TZURL:http://tzurl.org/zoneinfo/Pacific/Fiji
+X-LIC-LOCATION:Pacific/Fiji
+BEGIN:DAYLIGHT
+TZOFFSETFROM:+1200
+TZOFFSETTO:+1300
+DTSTART:20101024T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYMONTHDAY=21,22,23,24,25,26,27;BYDAY=SU
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:+1300
+TZOFFSETTO:+1200
+DTSTART:20140119T020000
+RRULE:FREQ=YEARLY;BYMONTH=1;BYMONTHDAY=18,19,20,21,22,23,24;BYDAY=SU
+END:STANDARD
+BEGIN:STANDARD
+TZOFFSETFROM:+115544
+TZOFFSETTO:+1200
+DTSTART:19151026T000000
+RDATE:19151026T000000
+END:STANDARD
+BEGIN:DAYLIGHT
+TZOFFSETFROM:+1200
+TZOFFSETTO:+1300
+DTSTART:19981101T020000
+RDATE:19981101T020000
+RDATE:19991107T020000
+RDATE:20091129T020000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZOFFSETFROM:+1300
+TZOFFSETTO:+1200
+DTSTART:19990228T030000
+RDATE:19990228T030000
+RDATE:20000227T030000
+RDATE:20100328T030000
+RDATE:20110306T030000
+RDATE:20120122T030000
+RDATE:20130120T030000
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+UID:noend123
+DTSTART;TZID=custom_Pacific/Fiji;VALUE=DATE-TIME:20140829T080000
+DTSTART;TZID=custom_Pacific/Fiji;VALUE=DATE-TIME:20140829T100000
+SUMMARY:an event with a custom tz name
+END:VEVENT
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/time.ics b/src/icalendar/fuzzing/corpus/time.ics
new file mode 100644
index 00000000..d730a4c4
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/time.ics
@@ -0,0 +1,3 @@
+BEGIN:VCALENDAR
+X-SOMETIME;VALUE=TIME:172010
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/timezone_rdate.ics b/src/icalendar/fuzzing/corpus/timezone_rdate.ics
new file mode 100644
index 00000000..5a4f7a9d
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/timezone_rdate.ics
@@ -0,0 +1,55 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+BEGIN:VTIMEZONE
+TZID:posix/Europe/Vaduz
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+002946
+TZOFFSETTO:+0100
+DTSTART:19011213T211538
+RDATE;VALUE=DATE-TIME:19011213T211538
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CEST
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+DTSTART:19810329T020000
+RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
+END:DAYLIGHT
+BEGIN:DAYLIGHT
+TZNAME:CEST
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+DTSTART:19410505T010000
+RDATE;VALUE=DATE-TIME:19410505T010000
+RDATE;VALUE=DATE-TIME:19420504T010000
+END:DAYLIGHT
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19810927T030000
+RRULE:FREQ=YEARLY;COUNT=15;BYDAY=-1SU;BYMONTH=9
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19961027T030000
+RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
+END:STANDARD
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19411006T020000
+RDATE;VALUE=DATE-TIME:19411006T020000
+RDATE;VALUE=DATE-TIME:19421005T020000
+END:STANDARD
+END:VTIMEZONE
+BEGIN:VEVENT
+UID:123
+DTSTART;TZID=posix/Europe/Vaduz:20120213T100000
+SUMMARY=testevent
+END:VEVENT
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/timezone_same_start.ics b/src/icalendar/fuzzing/corpus/timezone_same_start.ics
new file mode 100644
index 00000000..a221ae36
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/timezone_same_start.ics
@@ -0,0 +1,27 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:Microsoft Exchange Server 2010
+METHOD:REQUEST
+BEGIN:VTIMEZONE
+TZID:Pacific Standard Time
+BEGIN:STANDARD
+DTSTART:16010101T020000
+RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11
+TZOFFSETFROM:-0700
+TZOFFSETTO:-0800
+END:STANDARD
+BEGIN:DAYLIGHT
+DTSTART:16010101T020000
+RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3
+TZOFFSETFROM:-0800
+TZOFFSETTO:-0700
+END:DAYLIGHT
+END:VTIMEZONE
+BEGIN:VEVENT
+SUMMARY;LANGUAGE=en-US:Test 4
+DTSTART;TZID="Pacific Standard Time":20170224T120000
+DTEND;TZID="Pacific Standard Time":20170224T123000
+DTSTAMP:20170224T180431Z
+UID:040000008200E00074C5B7101A82E0080000000090E19664858ED20100000000000000
+END:VEVENT
+END:VCALENDAR
diff --git a/src/icalendar/fuzzing/corpus/timezone_same_start_and_offset.ics b/src/icalendar/fuzzing/corpus/timezone_same_start_and_offset.ics
new file mode 100644
index 00000000..0ec7ba0b
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/timezone_same_start_and_offset.ics
@@ -0,0 +1,23 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:Microsoft Exchange Server 2010
+BEGIN:VTIMEZONE
+TZID:Tokyo Standard Time
+BEGIN:STANDARD
+DTSTART:16010101T000000
+TZOFFSETFROM:+0900
+TZOFFSETTO:+0900
+END:STANDARD
+BEGIN:DAYLIGHT
+DTSTART:16010101T000000
+TZOFFSETFROM:+0900
+TZOFFSETTO:+0900
+END:DAYLIGHT
+END:VTIMEZONE
+BEGIN:VEVENT
+DTSTART;TZID="Tokyo Standard Time":20170224T120000
+DTEND;TZID="Tokyo Standard Time":20170224T123000
+UID:blafoobar
+SUMMARY:this is an event
+END:VEVENT
+END:VCALENDARD
diff --git a/src/icalendar/fuzzing/corpus/timezoned.ics b/src/icalendar/fuzzing/corpus/timezoned.ics
new file mode 100644
index 00000000..5878b723
--- /dev/null
+++ b/src/icalendar/fuzzing/corpus/timezoned.ics
@@ -0,0 +1,36 @@
+BEGIN:VCALENDAR
+PRODID:-//Plone.org//NONSGML plone.app.event//EN
+VERSION:2.0
+X-WR-CALNAME:test create calendar
+X-WR-CALDESC:icalendar test
+X-WR-RELCALID:12345
+X-WR-TIMEZONE:Europe/Vienna
+BEGIN:VTIMEZONE
+TZID:Europe/Vienna
+X-LIC-LOCATION:Europe/Vienna
+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
+BEGIN:VEVENT
+DTSTART;TZID=Europe/Vienna:20120213T100000
+DTEND;TZID=Europe/Vienna:20120217T180000
+DTSTAMP:20101010T091010Z
+CREATED:20101010T091010Z
+UID:123456
+SUMMARY:artsprint 2012
+DESCRIPTION:sprinting at the artsprint
+LOCATION:aka bild, wien
+END:VEVENT
+END:VCALENDAR