diff --git a/Lib/times.py b/Lib/times.py
index 9976886..f1cb7b8 100644
--- a/Lib/times.py
+++ b/Lib/times.py
@@ -135,12 +135,11 @@ def isMonthly(s):
     units=tim.units
     monthly=1
     for i in range(len(tim)-1):
-      month1=cdtime.reltime(tim[i],units).torel('months since 2000').value
-      month2=cdtime.reltime(tim[i+1],units).torel('months since 2000').value
+      month1=cdtime.reltime(tim[i],units).torel('months since 2000',tim.getCalendar()).value
+      month2=cdtime.reltime(tim[i+1],units).torel('months since 2000',tim.getCalendar()).value
       if month2-month1!=1 : monthly=0
     return monthly
 
-
 def mergeTime(ds,statusbar=1,fill_value=1.e20):
     '''
     Merge chronologically a bunch of slab
@@ -776,7 +775,7 @@ def dayBasedSlicer(tim,arg=None):
                         subarg='feb-29'
                     else:
                         t=cdtime.reltime(index,'month since 1997')
-                        t=t.tocomp()
+                        t=t.tocomp(tim.getCalendar())
                         subarg=str(t.month)+'-'+str(t.day)
                 except:
                     raise Exception,"Error, dayBasedSlicer args must have '-' or '/' as month/day separator"
diff --git a/share/test_data_files.txt b/share/test_data_files.txt
index 24fc9c9..23e6546 100644
--- a/share/test_data_files.txt
+++ b/share/test_data_files.txt
@@ -1,4 +1,4 @@
-http://uvcdat.llnl.gov/cdat/sample_data
+https://uvcdat.llnl.gov/cdat/sample_data
 aa51aa896ead44019335cebec68e7955  clt.nc
 332feb65b3801d7ab25845976bd23d85  vertical.nc
 0f928d5cc8b80e6a509a0a00f0fc87ad  tas_mo.nc