Recurrence Rule Parsing And Expansion

via “recurring event expansion with timezone-aware scheduling”

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

Unique: Implements RFC 5545 RRULE expansion with timezone-aware scheduling and DST handling, caching expanded instances to optimize repeated queries; includes EXDATE support for exception handling

vs others: Handles timezone-aware recurrence expansion natively, whereas many calendar libraries require manual DST adjustment or don't support complex RRULE patterns

** - CalDAV Nectcloud calendar integration. Manage calendars, events, attendees, etc.

Unique: Implements full RFC 5545 RRULE parsing and expansion with support for complex patterns (BYMONTHDAY, BYDAY, BYWEEKNO, etc.) and exception handling, rather than supporting only simple daily/weekly/monthly patterns

vs others: Handles complex recurrence rules that simplified calendar APIs don't support, enabling accurate representation of real-world recurring events like 'last Friday of each month' or 'every 2 weeks on Monday and Wednesday'

via “recursive grammar rules and reusable constraint patterns”

A guidance language for controlling large language models.

Unique: Implements RuleNode grammar constraints that support recursion and parameterization, enabling complex nested structures to be defined concisely. Rules are compiled into the grammar AST and can be referenced multiple times without duplication.

vs others: More maintainable than inline grammar definitions because rules can be reused, and more flexible than hardcoded patterns because rules can be parameterized with arguments.