UNIT must be ''second'', ''minute'', ''hour'', ''day'', ''week'', ''month'', ''quarter'', or ''year''. Ambiguous value for UNIT: ''{0}''. T and RULE must be the same size, or either one may be a scalar. RULE must be an integer value, an array of integer values, or one of the following: ''next'', ''previous'', ''current'', or ''nearest''. Day of week must be a number from 1 to 7, or a day name. Ambiguous value for day of week: ''{0}''. Second input must be ''start'', ''end'', or ''dayofweek''. RULE must be ''next'', ''previous'', or ''nearest'' when shifting with ''weekday'' or ''weekend''. A numeric RULE of 0 is not supported when shifting with ''weekday'' or ''weekend''.