diff --git a/README.md b/README.md
index 5e7a71d..5d07c94 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ where [options] can be one or more of:
 Plus one of the following:
 
 TO CALCULATE NUMBER OF LOVE GEMS YOU'LL HAVE ON A GIVEN DATE:
-[-d | --date]          Date to calculate gem count for
+[-d | --date]          Date to calculate gem count for (MM/DD/YYYY)
 
 TO CALCULATE HOW LONG UNTIL YOU WILL GET A CERTAIN NUMBER OF GEMS:
 [-G | --desired-gems]  Calculate level that card will be at given EXP
diff --git a/gemcalc.py b/gemcalc.py
index a42aa42..19c3ba0 100755
--- a/gemcalc.py
+++ b/gemcalc.py
@@ -131,7 +131,7 @@ def usage():
     print "Plus one of the following:"
     print ""
     print "TO CALCULATE NUMBER OF LOVE GEMS YOU'LL HAVE ON A GIVEN DATE:"
-    print "[-d | --date]          Date to calculate gem count for"
+    print "[-d | --date]          Date to calculate gem count for (MM/DD/YYYY)"
     print ""
     print "TO CALCULATE HOW LONG UNTIL YOU WILL GET A CERTAIN NUMBER OF GEMS:"
     print "[-G | --desired-gems]  Calculate level that card will be at given EXP"