You can do what you want with a DFSORT job like this. You'll need z/OS DFSORT V1R5 PTF UK90007 or DFSORT R14 PTF UK90006 (April, 2006) in order to use DFSORT's DATE2-d function. If you don't have the April, 2006 PTF, ask your System Programmer to install it (it's free). For complete details on all of the new DFSORT and ICETOOL functions available with the April, 2006 PTF, see:
Can't the date arithmetic be "DATE2-1" directly used in HEADER1?.
No. DATEn and variations are supported in BUILD, OVERLAY, COND, INCLUDE, OMIT and WHEN, but NOT in HEADERx or TRAILERx.
DATE=(...) and variations are supported in BUILD, OVERLAY, HEADERx and TRAILERx but there are no - or + forms for those variations.