diff --git a/src/lib/ical-io.js b/src/lib/ical-io.js
new file mode 100644
index 0000000..1414528
--- /dev/null
+++ b/src/lib/ical-io.js
@@ -0,0 +1,121 @@
+import ICAL from 'ical.js'
+
+// ------------------------------------------------------------------ //
+// Timezone registration (ical.js does not bundle IANA zones)
+// ------------------------------------------------------------------ //
+function registerTimezones(vcalendar) {
+  for (const vtz of vcalendar.getAllSubcomponents('vtimezone')) {
+    const tzid = vtz.getFirstPropertyValue('tzid')
+    if (tzid) {
+      ICAL.TimezoneService.register(tzid, new ICAL.Timezone({ component: vtz, tzid }))
+    }
+  }
+}
+
+// ------------------------------------------------------------------ //
+// Helpers
+// ------------------------------------------------------------------ //
+function pad2(n) {
+  return String(n).padStart(2, '0')
+}
+
+function timeToISODate(t) {
+  return `${t.year}-${pad2(t.month)}-${pad2(t.day)}`
+}
+
+function timeToHHMM(t) {
+  return `${pad2(t.hour)}:${pad2(t.minute)}`
+}
+
+function getTzid(component, propName) {
+  const prop = component.getFirstProperty(propName)
+  if (!prop) return 'UTC'
+  const tzid = prop.getParameter('tzid')
+  return tzid || 'UTC'
+}
+
+// ------------------------------------------------------------------ //
+// Parse a single VEVENT component -> plain EventModel
+// ------------------------------------------------------------------ //
+function parseEvent(veventComp) {
+  const event = new ICAL.Event(veventComp)
+  const start = event.startDate
+  const end = event.endDate
+
+  // Determine tzid
+  const tzid = getTzid(veventComp, 'dtstart')
+
+  // RRULE
+  const recur = veventComp.getFirstPropertyValue('rrule')
+  let rrule = null
+  if (recur) {
+    const bydayArr = recur.getComponent('byday') // string[]
+    let untilDate = null
+    if (recur.until) {
+      const u = recur.until
+      untilDate = `${u.year}-${pad2(u.month)}-${pad2(u.day)}`
+    }
+    rrule = {
+      freq: recur.freq,
+      interval: recur.interval || 1,
+      byday: bydayArr.length > 0 ? bydayArr[0] : null,
+      untilDate,
+    }
+  }
+
+  // EXDATEs
+  const exdates = []
+  for (const prop of veventComp.getAllProperties('exdate')) {
+    for (const t of prop.getValues()) {
+      exdates.push(timeToISODate(t))
+    }
+  }
+
+  // _raw: capture DTSTAMP and any other unmapped properties
+  // Use toICALString() to preserve the compact RFC5545 form ("20260711T085008Z")
+  // rather than toString()'s ISO 8601 form ("2026-07-11T08:50:08Z").
+  const _raw = {}
+  const dtstamp = veventComp.getFirstPropertyValue('dtstamp')
+  if (dtstamp) _raw.dtstamp = dtstamp.toICALString()
+
+  return {
+    uid: veventComp.getFirstPropertyValue('uid') || '',
+    summary: veventComp.getFirstPropertyValue('summary') || '',
+    location: veventComp.getFirstPropertyValue('location') || '',
+    description: veventComp.getFirstPropertyValue('description') || '',
+    dtstartDate: timeToISODate(start),
+    dtstartTime: timeToHHMM(start),
+    dtendTime: timeToHHMM(end),
+    tzid,
+    rrule,
+    exdates,
+    _raw,
+  }
+}
+
+// ------------------------------------------------------------------ //
+// Parse full ICS text -> { meta, events }
+// ------------------------------------------------------------------ //
+export function parseICS(text) {
+  const jcal = ICAL.parse(text)
+  const vcalendar = new ICAL.Component(jcal)
+
+  // Register timezones from VTIMEZONEs before constructing zoned Times
+  registerTimezones(vcalendar)
+
+  // Meta
+  const meta = {
+    prodid: vcalendar.getFirstPropertyValue('prodid') || '',
+    version: vcalendar.getFirstPropertyValue('version') || '2.0',
+    calscale: vcalendar.getFirstPropertyValue('calscale') || 'GREGORIAN',
+    method: vcalendar.getFirstPropertyValue('method') || null,
+    xWrCalname: vcalendar.getFirstPropertyValue('x-wr-calname') || null,
+    xWrTimezone: vcalendar.getFirstPropertyValue('x-wr-timezone') || null,
+    vtimezones: vcalendar.getAllSubcomponents('vtimezone'),
+  }
+
+  // Events
+  const events = vcalendar.getAllSubcomponents('vevent').map(parseEvent)
+
+  return { meta, events }
+}
diff --git a/test/golden-org.ics b/test/golden-org.ics
new file mode 100644
index 0000000..abfa14a
--- /dev/null
+++ b/test/golden-org.ics
@@ -0,0 +1,574 @@
+BEGIN:VCALENDAR
+PRODID:-//Allocate//iCal4j 1.0//EN
+VERSION:2.0
+CALSCALE:GREGORIAN
+BEGIN:VTIMEZONE
+TZID:Australia/Melbourne
+LAST-MODIFIED:20260306T231828Z
+TZURL:https://www.tzurl.org/zoneinfo-outlook/Australia/Melbourne
+X-LIC-LOCATION:Australia/Melbourne
+BEGIN:STANDARD
+TZNAME:AEST
+TZOFFSETFROM:+1100
+TZOFFSETTO:+1000
+DTSTART:19700405T030000
+RRULE:FREQ=YEARLY;BYMONTH=4;BYDAY=1SU
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:AEDT
+TZOFFSETFROM:+1000
+TZOFFSETTO:+1100
+DTSTART:19701004T020000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=1SU
+END:DAYLIGHT
+END:VTIMEZONE
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260727T180000
+DTEND;TZID=Australia/Melbourne:20260727T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid0
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260803T180000
+DTEND;TZID=Australia/Melbourne:20260803T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid1
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260810T180000
+DTEND;TZID=Australia/Melbourne:20260810T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid2
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260817T180000
+DTEND;TZID=Australia/Melbourne:20260817T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid3
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260824T180000
+DTEND;TZID=Australia/Melbourne:20260824T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid4
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260831T180000
+DTEND;TZID=Australia/Melbourne:20260831T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid5
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260907T180000
+DTEND;TZID=Australia/Melbourne:20260907T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid6
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260914T180000
+DTEND;TZID=Australia/Melbourne:20260914T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid7
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260928T180000
+DTEND;TZID=Australia/Melbourne:20260928T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid8
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261005T180000
+DTEND;TZID=Australia/Melbourne:20261005T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid9
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261012T180000
+DTEND;TZID=Australia/Melbourne:20261012T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid10
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261019T180000
+DTEND;TZID=Australia/Melbourne:20261019T200000
+SUMMARY:ACC INFO SYS\, Tutorial
+LOCATION:CA_B_B471
+DESCRIPTION:ACF2400_CA_S2_ON-CAMPUS\, Tutorial\, 04_OnCampus\nACC INFO SYS\nStaff: Staff_151\nLocation: CA_B_B471
+UID:uid11
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260727T093000
+DTEND;TZID=Australia/Melbourne:20260727T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid12
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260803T093000
+DTEND;TZID=Australia/Melbourne:20260803T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid13
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260810T093000
+DTEND;TZID=Australia/Melbourne:20260810T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid14
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260817T093000
+DTEND;TZID=Australia/Melbourne:20260817T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid15
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260824T093000
+DTEND;TZID=Australia/Melbourne:20260824T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid16
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260907T093000
+DTEND;TZID=Australia/Melbourne:20260907T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid17
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260914T093000
+DTEND;TZID=Australia/Melbourne:20260914T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid18
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260928T093000
+DTEND;TZID=Australia/Melbourne:20260928T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid19
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261005T093000
+DTEND;TZID=Australia/Melbourne:20261005T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid20
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261012T093000
+DTEND;TZID=Australia/Melbourne:20261012T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid21
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261019T093000
+DTEND;TZID=Australia/Melbourne:20261019T110000
+SUMMARY:BUS LAW\, Tutorial
+LOCATION:CA_H_H212
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Tutorial\, 23_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_H_H212
+UID:uid22
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260812T130000
+DTEND;TZID=Australia/Melbourne:20260812T150000
+SUMMARY:BUS LAW\, Workshop
+LOCATION:CA_K_K309
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Workshop\, 01_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_K_K309
+UID:uid23
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260902T130000
+DTEND;TZID=Australia/Melbourne:20260902T150000
+SUMMARY:BUS LAW\, Workshop
+LOCATION:CA_K_K309
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Workshop\, 01_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_K_K309
+UID:uid24
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260930T130000
+DTEND;TZID=Australia/Melbourne:20260930T150000
+SUMMARY:BUS LAW\, Workshop
+LOCATION:CA_K_K309
+DESCRIPTION:BTF1010_CA_S2_ON-CAMPUS\, Workshop\, 01_OnCampus\nBUS LAW\nStaff: -\nLocation: CA_K_K309
+UID:uid25
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260729T100000
+DTEND;TZID=Australia/Melbourne:20260729T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid26
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260805T100000
+DTEND;TZID=Australia/Melbourne:20260805T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid27
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260812T100000
+DTEND;TZID=Australia/Melbourne:20260812T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid28
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260819T100000
+DTEND;TZID=Australia/Melbourne:20260819T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid29
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260826T100000
+DTEND;TZID=Australia/Melbourne:20260826T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid30
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260909T100000
+DTEND;TZID=Australia/Melbourne:20260909T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid31
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260916T100000
+DTEND;TZID=Australia/Melbourne:20260916T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid32
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260930T100000
+DTEND;TZID=Australia/Melbourne:20260930T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid33
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261007T100000
+DTEND;TZID=Australia/Melbourne:20261007T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid34
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261014T100000
+DTEND;TZID=Australia/Melbourne:20261014T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid35
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261021T100000
+DTEND;TZID=Australia/Melbourne:20261021T120000
+SUMMARY:MICRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1100_CA_S2_ON-CAMPUS\, Workshop\, 04_OnCampus\nMICRO\nStaff: -\nLocation: CA_H_H116
+UID:uid36
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260731T120000
+DTEND;TZID=Australia/Melbourne:20260731T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid37
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260807T120000
+DTEND;TZID=Australia/Melbourne:20260807T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid38
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260814T120000
+DTEND;TZID=Australia/Melbourne:20260814T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid39
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260821T120000
+DTEND;TZID=Australia/Melbourne:20260821T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid40
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260828T120000
+DTEND;TZID=Australia/Melbourne:20260828T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid41
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260904T120000
+DTEND;TZID=Australia/Melbourne:20260904T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid42
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260911T120000
+DTEND;TZID=Australia/Melbourne:20260911T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid43
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260918T120000
+DTEND;TZID=Australia/Melbourne:20260918T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid44
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261002T120000
+DTEND;TZID=Australia/Melbourne:20261002T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid45
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261009T120000
+DTEND;TZID=Australia/Melbourne:20261009T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid46
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261016T120000
+DTEND;TZID=Australia/Melbourne:20261016T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid47
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261023T120000
+DTEND;TZID=Australia/Melbourne:20261023T130000
+SUMMARY:MACRO\, Applied
+LOCATION:Online\, Melbourne
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Applied\, 01_OnlineRealTime\nMACRO\nStaff: -\nLocation: Online\, Melbourne
+UID:uid48
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260730T100000
+DTEND;TZID=Australia/Melbourne:20260730T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid49
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260806T100000
+DTEND;TZID=Australia/Melbourne:20260806T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid50
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260813T100000
+DTEND;TZID=Australia/Melbourne:20260813T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid51
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260820T100000
+DTEND;TZID=Australia/Melbourne:20260820T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid52
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260827T100000
+DTEND;TZID=Australia/Melbourne:20260827T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid53
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260903T100000
+DTEND;TZID=Australia/Melbourne:20260903T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid54
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260910T100000
+DTEND;TZID=Australia/Melbourne:20260910T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid55
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20260917T100000
+DTEND;TZID=Australia/Melbourne:20260917T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid56
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261001T100000
+DTEND;TZID=Australia/Melbourne:20261001T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid57
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261008T100000
+DTEND;TZID=Australia/Melbourne:20261008T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid58
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261015T100000
+DTEND;TZID=Australia/Melbourne:20261015T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid59
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20260711T085008Z
+DTSTART;TZID=Australia/Melbourne:20261022T100000
+DTEND;TZID=Australia/Melbourne:20261022T120000
+SUMMARY:MACRO\, Workshop
+LOCATION:CA_H_H116
+DESCRIPTION:ECF1200_CA_S2_ON-CAMPUS\, Workshop\, 05_OnCampus\nMACRO\nStaff: -\nLocation: CA_H_H116
+UID:uid60
+END:VEVENT
+END:VCALENDAR
diff --git a/test/ical-io.test.js b/test/ical-io.test.js
new file mode 100644
index 0000000..44cdbe6
--- /dev/null
+++ b/test/ical-io.test.js
@@ -0,0 +1,50 @@
+import { describe, it, expect } from 'vitest'
+import { readFileSync } from 'node:fs'
+import { fileURLToPath } from 'node:url'
+import { dirname, join } from 'node:path'
+import { parseICS } from '../src/lib/ical-io.js'
+
+const __dirname = dirname(fileURLToPath(import.meta.url))
+const GOLDEN = readFileSync(join(__dirname, 'golden-org.ics'), 'utf-8')
+
+describe('parseICS', () => {
+  const { meta, events } = parseICS(GOLDEN)
+
+  it('parses calendar meta', () => {
+    expect(meta.prodid).toBe('-//Allocate//iCal4j 1.0//EN')
+    expect(meta.version).toBe('2.0')
+    expect(meta.calscale).toBe('GREGORIAN')
+    expect(meta.vtimezones.length).toBe(1)
+  })
+
+  it('parses all 61 events', () => {
+    expect(events).toHaveLength(61)
+  })
+
+  it('parses first event fields correctly', () => {
+    const e = events[0]
+    expect(e.summary).toBe('ACC INFO SYS, Tutorial')
+    expect(e.location).toBe('CA_B_B471')
+    expect(e.dtstartDate).toBe('2026-07-27')
+    expect(e.dtstartTime).toBe('18:00')
+    expect(e.dtendTime).toBe('20:00')
+    expect(e.tzid).toBe('Australia/Melbourne')
+    expect(e.rrule).toBeNull()
+    expect(e.exdates).toEqual([])
+  })
+
+  it('preserves description with escaped commas', () => {
+    const e = events[0]
+    expect(e.description).toContain('ACF2400_CA_S2_ON-CAMPUS')
+    expect(e.description).toContain('ACC INFO SYS')
+  })
+
+  it('captures dtstamp in _raw', () => {
+    expect(events[0]._raw.dtstamp).toBe('20260711T085008Z')
+  })
+
+  it('events have UIDs', () => {
+    expect(events[0].uid).toBe('uid0')
+    expect(events[60].uid).toBe('uid60')
+  })
+})