diff --git a/src/libiso8601/functions.h b/src/libiso8601/functions.h
index 240ff3f..de00936 100644
--- a/src/libiso8601/functions.h
+++ b/src/libiso8601/functions.h
@@ -69,6 +69,7 @@ void iso8601_print(char* str, int amt, const struct iso8601_date* date,
 /* manip.c */
 int iso8601_lt(const struct iso8601_date* d1, const struct iso8601_date* d2);
 int iso8601_lte(const struct iso8601_date* d1, const struct iso8601_date* d2);
+int iso8601_eq(const struct iso8601_date* d1, const struct iso8601_date* d2);
 void iso8601_add_seconds(struct iso8601_date* date, long seconds);
 
 /* leap.c */
diff --git a/src/libiso8601/manip.c b/src/libiso8601/manip.c
index c489f60..e611a1d 100644
--- a/src/libiso8601/manip.c
+++ b/src/libiso8601/manip.c
@@ -13,8 +13,8 @@ int iso8601_lt(const struct iso8601_date* d1, const struct iso8601_date* d2)
     if(d1->day > d2->day) return 0;
     if(d1->sec < d2->sec) return 1;
     if(d1->sec > d2->sec) return 0;
-    if(d1->nsec < d2->nsec) return 0;
-    return 1;
+    if(d1->nsec < d2->nsec) return 1;
+    return 0;
 }
 
 
@@ -25,12 +25,19 @@ int iso8601_lte(const struct iso8601_date* d1, const struct iso8601_date* d2)
     if(d1->day > d2->day) return 0;
     if(d1->sec < d2->sec) return 1;
     if(d1->sec > d2->sec) return 0;
-    if(d1->nsec < d2->nsec) return 0;
+    if(d1->nsec < d2->nsec) return 1;
     return d1->nsec == d2->nsec;
 }
 
 
 
+int iso8601_eq(const struct iso8601_date* d1, const struct iso8601_date* d2)
+{
+    return (d1->day == d2->day) && (d1->sec == d2->sec) && (d1->nsec == d2->nsec);
+}
+
+
+
 void iso8601_add_seconds(struct iso8601_date* date, long seconds)
 {
     int sday;