Flexible, Taskwarrior-esque parsing for dates and times:
- hh:mm (15:04)
- MM-DD (01-02)
- YYYY-MM-DD (2006-01-02)
- YYYY-MM-DDThh:mm (2006-01-02T15:04)
- YYYY-MM-DDThhmm (2006-01-02T1504)
- Days of the week (mon, monday)
- Months of the year (jan, january)
- Year dates (soy, eom, sonq, eopm, etc.)
- Week dates (sow, eow, sonw, eonw, etc.)
- Special dates (later, someday - 9999-12-31T23:59:59)
- Holidays (easter, goodfriday, eastermonday, ascension, pentecost)