I don't know what you are working on, but I really like this report which lists all of our schedule object rules including calendar keywords;
select oh_name as SCHEDULE
, jpp_object as OBJECT
, JPP_ErlstStTime as STARTTIME
, jppc_calekeyname as CALENDAR
from uc4.dbo.oh
inner join uc4.dbo.jpp
on oh_idnr = jpp_oh_idnr
left outer join uc4.dbo.jppc
on jppc_jpp_lnr = jpp_lnr and jppc_oh_idnr = oh_idnr
where oh_otype = 'JSCH'
order by 3,2,4;