System Status: Syncing

Stop losing events to protocol translation errors.

Calendar data is brittle. Between CalDAV servers, ICS parsing, and timezone offsets, dropping an event is a matter of when, not if. We index the exact mechanics of how calendar sync breaks across devices—and how to fix it.

Read the iCalendar Spec Access Diagnostic Tools

RAW .ICS LOG DUMP // PARSE ERROR LINE 42

BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Phone Calender//EN BEGIN:VEVENT UID:[email protected] DTSTAMP:20240902T233400Z DTSTART;TZID=America/New_York:20241015T090000 DTEND;TZID=America/New_York:20241015T100000 SUMMARY:Critical Sync Check STATUS:CONFIRMED RRULE:FREQ=WEEKLY;BYDAY=MO,WE,FR END:VEVENT END:VCALENDAR

ERR_TZID_MISSING SEV 1

The Architecture of Failure

Index: 04.A.29

Timezone Drift

Floating times versus fixed UTC offsets. When a device relies on a local VTIMEZONE definition that doesn't match the IANA Time Zone Database, recurring events shift unpredictably across Daylight Saving boundaries.

Investigate Drift →

UID Collisions

When importing via CalDAV, identical UID tags across disparate event streams cause silent overwrites. Your meeting didn't disappear; it was mathematically replaced by a similarly structured record from another source.

Analyze UIDs →

RRULE Parsing

Recurrence rules (RRULE) are heavily standard-dependent. An exception (EXDATE) generated on Apple Calendar frequently fails validation on Google Calendar due to minute syntax deviations in the sequence string.

Parse RRULEs →

Diagnostic Tooling

Don't guess why an invite failed. Paste the raw .ics data into our diagnostic terminal to validate against RFC 5545 compliance, check timezone consistency, and preview the parsed recurrence output.