- Add month name parsing (jan, january, feb, etc.) with year logic
- Add day+month parsing (21jan, Jan21, 21January, etc.) in all case variations
- Add period boundaries (sod, eod, sow, eow, som, eom, soy, eoy)
- Add special keywords (later, someday -> 2150-01-01)
- Add duration-as-date offset (2d, 3w, etc. means X from now)
- Add named duration aliases (daily, weekly, monthly, yearly)
- Enhance ParseRecurrencePattern to support min, sec, hrs and word forms
- Implement time-of-day parsing (mon:15:35, tomorrow:0800, 15:35)
- Add comprehensive test suite (50+ tests total)
- All tests passing
