chris
175305a28f
CalDAV DTSTART/DTEND now use UTC (Z-suffix) instead of TZID local time. Without a VTIMEZONE component, some CalDAV servers strip the TZID on return, causing ical.js to read the times as UTC — shifting every event 4 hours early and letting taken slots appear free. Slot query range changed from ±6h around UTC midnight (36-hour window) to 3AM–6AM UTC the next day (~27h) which covers the full ET business day without pulling in afternoon events from the previous day. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>