def initialDate = Date.parse("dd/MM/yyyy", "01/01/2012")
def finalDate = Date.parse("dd/MM/yyyy", "15/01/2012")
def dateRange = (initialDate..finalDate)
println dateRange
"dateRange" will be an array with all dates between the two dates (inclusive).
Sun Jan 01 00:00:00 BRST 2012
Mon Jan 02 00:00:00 BRST 2012
Tue Jan 03 00:00:00 BRST 2012
Wed Jan 04 00:00:00 BRST 2012
Thu Jan 05 00:00:00 BRST 2012
Fri Jan 06 00:00:00 BRST 2012
Sat Jan 07 00:00:00 BRST 2012
Sun Jan 08 00:00:00 BRST 2012
Mon Jan 09 00:00:00 BRST 2012
Tue Jan 10 00:00:00 BRST 2012
Wed Jan 11 00:00:00 BRST 2012
Thu Jan 12 00:00:00 BRST 2012
Fri Jan 13 00:00:00 BRST 2012
Sat Jan 14 00:00:00 BRST 2012
Sun Jan 15 00:00:00 BRST 2012