ICS IMPORT AND DUPLICATE-REVIEW RECORD
Blank editorial worksheet. No account import or cleanup has been performed.
Keep private calendar URLs and personal appointments out of public copies.

BEFORE IMPORT
Purpose: migration / dated reference / changing schedule / other
Calendar app and account used: _________________________________________
Source publisher and year/range: _______________________________________
File name, export date and version: ____________________________________
Existing subscription or overlapping import? ___________________________
Destination calendar (avoid an accidental primary-calendar import): _____
Backup/export location, date and permission: ____________________________
All-day sample to check: _______________________________________________
Timed sample / source and destination zone to check: ____________________
Recurring sample and exception to check, if present: ____________________

AFTER ONE IMPORT
Exact result message / time: ___________________________________________
Expected sample present? _______________________________________________
Correct calendar / dates / time interpretation? _________________________
Missing details, guests or conferencing to verify separately: ___________
File marked already imported; next action: ______________________________

DUPLICATE REVIEW - BACK UP BEFORE REMOVING ANYTHING
App / account / calendars currently displayed: _________________________
Suspected pair / which calendar each belongs to: ________________________
Same title only, or same underlying event? ______________________________
Start / end / all-day / recurrence differences: _________________________
Available source, UID, revision or exception detail: _____________________
Which copy remains authoritative and why? _______________________________
Personal edits or unique appointments that must be retained: ____________
One isolated reversible display check performed: ________________________
Confirmed cleanup scope / exact app recovery method: ____________________
Remaining uncertainty and next responsible action: ______________________

REFERENCE
Import = snapshot; subscription = connected feed, updates may be delayed.
Same holiday title need not mean same actual/observed date or jurisdiction.
UID identifies a component; recurring exceptions need separate review.
Do not mass-delete by title, regenerate UIDs or repeatedly import to guess.
An all-day DTSTART 20270115 with DTEND 20270116 covers January 15 only.

ILLUSTRATIVE TEXT ONLY - FICTIONAL PRACTICE EVENT
The following explains fields, not a production-ready migration or a
promise of deduplication. Use your app's export format for real transfers.
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//DayMoon//Illustrative practice only//EN
BEGIN:VEVENT
UID:daymoon-practice-review-20270115@daymooncalendar.com
DTSTAMP:20261030T160000Z
DTSTART;VALUE=DATE:20270115
DTEND;VALUE=DATE:20270116
SUMMARY:Practice review day - fictional
END:VEVENT
END:VCALENDAR

Sources:
https://support.google.com/calendar/answer/37118?hl=en
https://support.google.com/calendar/answer/45654
https://support.google.com/calendar/answer/37111
https://support.microsoft.com/en-us/office/import-or-subscribe-to-a-calendar-in-outlook-com-or-outlook-on-the-web-cff1429c-5af6-41ec-a5b4-74f2c278e98c
https://www.rfc-editor.org/rfc/rfc5545.html