Dates can be expressed in the format YYYYMMDD or YYYYMMDDHHMMSS. If the argument begins with a '+' or '-', it is interpreted as an offset from the present time. For convenience, if such an offset is followed by one of the suffixes 'y', 'mo', 'w', 'd', 'h', or 'mi', then the offset is computed in years (defined as 365 24-hour days, ignoring leap years), months (defined as 30 24-hour days), weeks, days, hours, or minutes, respectively. Without a suffix, the offset is computed in seconds. To unset a date, use 'none'.
-P date/offset
Sets the date on which a key is to be published to the zone. After that date, the key will be included in the zone but will not be used to sign it.
-A date/offset
Sets the date on which the key is to be activated. After that date, the key will be included in the zone and used to sign it.
-R date/offset
Sets the date on which the key is to be revoked. After that date, the key will be flagged as revoked. It will be included in the zone and will be used to sign it.
-I date/offset
Sets the date on which the key is to be retired. After that date, the key will still be included in the zone, but it will not be used to sign it.
-D date/offset
Sets the date on which the key is to be deleted. After that date, the key will no longer be included in the zone. (It may remain in the key repository, however.)