diff --git a/lib/isc/unix/include/isc/time.h b/lib/isc/unix/include/isc/time.h
index f694efeca1..358e0bcc4a 100644
--- a/lib/isc/unix/include/isc/time.h
+++ b/lib/isc/unix/include/isc/time.h
@@ -41,6 +41,8 @@ typedef struct isc_interval {
 	unsigned int nanoseconds;
 } isc_interval_t;
 
+extern isc_interval_t *isc_interval_zero;
+
 void
 isc_interval_set(isc_interval_t *i,
 		 unsigned int seconds, unsigned int nanoseconds);
@@ -83,6 +85,8 @@ typedef struct isc_time {
 	unsigned int	nanoseconds;
 } isc_time_t;
 
+extern isc_time_t *isc_time_epoch;
+
 void
 isc_time_settoepoch(isc_time_t *t);
 /*
@@ -106,7 +110,7 @@ isc_time_isepoch(isc_time_t *t);
  */
 
 isc_result_t
-isc_time_get(isc_time_t *t);
+isc_time_now(isc_time_t *t);
 /*
  * Set 't' to the current absolute time.
  *
@@ -120,6 +124,28 @@ isc_time_get(isc_time_t *t);
  *	Unexpected error
  */
 
+isc_result_t
+isc_time_nowplusinterval(isc_time_t *t, isc_interval_t *i);
+/*
+ * Set *t to the current absolute time + i.
+ *
+ * Note:
+ *
+ *	This call is equivalent to:
+ *
+ *		isc_time_now(t);
+ *		isc_time_add(t, i, t);
+ *
+ * Requires:
+ *
+ *	't' and 'i' are valid.
+ *
+ * Returns:
+ *
+ *	Success
+ *	Unexpected error
+ */
+
 int
 isc_time_compare(isc_time_t *t1, isc_time_t *t2);
 /*
diff --git a/lib/isc/unix/time.c b/lib/isc/unix/time.c
index 36ec8bceb0..d703d02e76 100644
--- a/lib/isc/unix/time.c
+++ b/lib/isc/unix/time.c
@@ -34,6 +34,9 @@
  *** Intervals
  ***/
 
+static isc_interval_t zero_interval = { 0, 0 };
+isc_interval_t *isc_interval_zero = &zero_interval;
+
 void
 isc_interval_set(isc_interval_t *i,
 		 unsigned int seconds, unsigned int nanoseconds) {
@@ -71,6 +74,9 @@ isc_interval_iszero(isc_interval_t *i) {
  *** Absolute Times
  ***/
 
+static isc_time_t epoch = { 0, 0 };
+isc_time_t *isc_time_epoch = &epoch;
+
 void
 isc_time_settoepoch(isc_time_t *t) {
 	/*
@@ -99,7 +105,7 @@ isc_time_isepoch(isc_time_t *t) {
 }
 
 isc_result_t
-isc_time_get(isc_time_t *t) {
+isc_time_now(isc_time_t *t) {
 	struct timeval tv;
 
 	/*
@@ -119,6 +125,32 @@ isc_time_get(isc_time_t *t) {
 	return (ISC_R_SUCCESS);
 }
 
+isc_result_t
+isc_time_nowplusinterval(isc_time_t *t, isc_interval_t *i) {
+	struct timeval tv;
+
+	/*
+	 * Set *t to the current absolute time + i.
+	 */
+	
+	REQUIRE(t != NULL);
+	REQUIRE(i != NULL);
+	
+	if (gettimeofday(&tv, NULL) == -1) {
+		UNEXPECTED_ERROR(__FILE__, __LINE__, strerror(errno));
+		return (ISC_R_UNEXPECTED);
+	}
+
+	t->seconds = tv.tv_sec + i->seconds;
+	t->nanoseconds = tv.tv_usec * 1000 + i->nanoseconds;
+	if (t->nanoseconds > 1000000000) {
+		t->seconds++;
+		t->nanoseconds -= 1000000000;
+	}
+
+	return (ISC_R_SUCCESS);
+}
+
 int
 isc_time_compare(isc_time_t *t1, isc_time_t *t2) {