ICS to CSV converter

Repeating events are not expanded: each exports once with the rule in words plus the original RRULE, and a changed occurrence becomes its own row tagged with the replaced date. Times with a zone name or a Z convert through this browser's own time-zone tables, which follow daylight saving; floating times have no zone and export exactly as written. Alarms, attendee reply statuses, and attachments do not fit a spreadsheet row and are dropped, with counts. Cells starting with =, +, -, or @ carry a leading apostrophe so a sheet never evaluates them. The download is UTF-8 with a byte-order mark so Excel reads it cleanly. Everything runs in this tab; nothing is uploaded and no iCloud account is touched.