Banner, PeopleSoft, and Workday export feeds with missing VTIMEZONEs and broken RRULE syntax. We detect and repair 36+ RFC 5545 violations. Paste your feed URL to see exactly what's broken.
Paste the URL of your broken calendar feed
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We've analyzed thousands of Ellucian Colleague calendar feeds. Here are the most common RFC 5545 violations we detect and repair automatically at the network edge.
Calendar feed lacks VTIMEZONE definition for non-UTC times
Impact
Events appear at wrong time on iOS/Android (typically 4-8 hours off)
How Lokr Fixes It
We inject RFC 5545-compliant VTIMEZONE blocks automatically
RFC 5545 §3.6.5 requires VTIMEZONE components for all non-UTC DATETIME values
UNTIL date type doesn't match DTSTART type (DATE vs DATETIME)
Impact
Recurring events end prematurely or extend indefinitely
How Lokr Fixes It
We normalize UNTIL to match DTSTART type and timezone
RFC 5545 §3.3.10 requires UNTIL to match DTSTART value type
2
Total Error Types
1
Critical Errors
100%
Fixed Automatically
<15ms
Repair Latency
Integration with legacy systems like Ellucian Colleague requires infrastructure-level remediation to ensure mobile sync reliability.
Colleague often times out when generating large semester schedules, resulting in incomplete ICS files.
We force-refresh the feed headers to bypass Google's 12-hour cache.
Recurring class sessions break due to invalid RRULE syntax that iOS and Google Calendar reject.
The VEVENT contains a property that is not supported by Microsoft Exchange.
Special characters in course names often render as garbage text on mobile devices.
Access Colleague Self-Service.
Go to Student Planning > My Schedule.
Click the calendar export icon.
Copy the subscription URL.
Run it through Lokr to fix encoding and recurrence errors.
We don't sell to end-users. We build for the engineers and admins who have to keep the systems running.
"Ellucian Banner generates compliant ICS files for desktop, but they break on iOS. Lokr standardizes the output so students actually see their exam schedules."
James T.
University Registrar, Major State University
"Integrating Canvas was easy, but the calendar subscriptions were flaky. Lokr's proxy layer stabilized the Canvas feeds for over 40,000 students."
Elena R.
CIO, Private Research University
"We use Salesforce for alumni events. Lokr cleans the feed so alum on old Android devices still get the correct event times."
Marcus L.
Alumni Relations Tech Lead, Liberal Arts College
Ellucian Colleague is a critical component for these industries. See how Lokr provides infrastructure-grade calendar sync for each specific vertical.
Diagnose errors and test the fix instantly.
Fix one critical feed.
Department-wide infrastructure.
Organization-wide infrastructure.
Higher Education departments utilize the Standard plan to remediate SIS export errors.
Standardize your campus calendar infrastructure.
Contact Sales, we’ll set up your perfect feed today.
Stop fielding support tickets about broken calendars. Get a verified, RFC-compliant feed today.
Initialize a production Ellucian Colleague proxy environment with Zero-Persistence security.
Review technical standards across Higher Ed, Logistics, and Enterprise IT.
Step-by-step remediation for Canvas, Greenhouse, Ellucian, and PeopleSoft.