A pure Rust (partial) implementation of recurrence rules as defined in the iCalendar RFC.
```rust extern crate rrule;
use rrule::build_rrule;
let mut rruleset = buildrule("RRULE:UNTIL=19990404T110000Z;DTSTART;TZID=America/New_York:19990104T110000Z;FREQ=WEEKLY;BYDAY=TU,WE");
// Get all occurrences of the rrule set let occurences = rrule_set.all(); ```