Checks if this unit is a date unit. !(p) All units from days to eras inclusive are date-based. Time-based units and {@code FOREVER} return false.
@return true if a date unit, false if a time unit
See Implementation
Checks if this unit is a date unit. !(p) All units from days to eras inclusive are date-based. Time-based units and {@code FOREVER} return false.
@return true if a date unit, false if a time unit