General Information

Negative values take precedence over positive values when determining whether a rule is scheduled on a certain date. If a negative value (meaning, format –n, –Dn, –Ln, –DnPi, or –LnPi) in either the DAYS or WDAYS field prevents a rule from being scheduled on a date, the rule is not scheduled on that date even if a positive value (for example, Ln) would otherwise result in the rule being scheduled on that date.

A maximum of eight periodic values (meaning, of type DnPi, –DnPi, LnPi, and –LnPi) can be designated in any desired order.

If periodic and non-periodic values are mixed when specifying parameter DAYS, processing depends on the type of calendar specified in parameter DCAL.

• If a non-periodic calendar is specified in the DCAL parameter, only non-periodic values in the DAYS parameter are processed; periodic values are ignored. In this case, negative periodic values (meaning, –DnPi, –LnPi) are also ignored and do not supersede other values.
• If a periodic calendar is specified in the DCAL parameter, all periodic values and the negative non-periodic value -n in the DAYS parameter are processed; all other non-periodic values are ignored.

Parameter MONTHS is ignored when periodic values are specified in parameter DAYS.

Parameter DAYS cannot be used with parameter DATES.