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.
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We've analyzed thousands of D2L Brightspace calendar feeds. Here are the most common RFC 5545 violations we detect and repair automatically at the network edge.
DTSTAMP is more than 7 days old
Impact
Calendar clients may reject updates or fail cache invalidation
How Lokr Fixes It
We refresh DTSTAMP to current UTC time on every request
RFC 5545 §3.8.7.2 requires DTSTAMP to reflect last modification time
Recurrence rule has invalid syntax or unsupported values
Impact
Recurring events fail to repeat or show incorrect instances
How Lokr Fixes It
We sanitize RRULE syntax and normalize FREQ, BYDAY, UNTIL values
RFC 5545 §3.3.10 defines strict RRULE syntax requirements
2
Total Error Types
0
Critical Errors
100%
Fixed Automatically
<15ms
Repair Latency
Integration with legacy systems like D2L Brightspace requires infrastructure-level remediation to ensure mobile sync reliability.
Brightspace stores time universally but displays locally. Exports often lose this translation.
14:00 GMT
09:00 EST
Re-importing feeds often duplicates events. Lokr creates a stable, unique ID for every assignment.
Changes in your phone calendar don't sync back. We create a reliable read-only stream.
Log in to D2L/Brightspace.
Click 'Calendar' > 'Settings' > 'Enable Calendar Feeds'.
Click 'Subscribe'.
Copy the URL provided.
Use Lokr to format it for your specific device.
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
D2L Brightspace 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 D2L Brightspace 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.