ISO Date in RPGLE

We use a canned package software – SSA’s PRMS.  They use ISO Dates in
all files.  If a date is not required at the time they put 0001-01-01 in
for the default date.  In ILE I tried to compare the date field with
0001-01-01 and could not make it work.  First how can I see if the date
is equal to 0001-01-01 and second how can I fill the date with
0001-01-01.

Thanks
 

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