diff --git a/src/time/time.go b/src/time/time.go
index c31de357d5..a6e100fa71 100644
--- a/src/time/time.go
+++ b/src/time/time.go
@@ -640,6 +640,12 @@ func Since(t Time) Duration {
 	return Now().Sub(t)
 }
 
+// Until returns the duration until t.
+// It is shorthand for t.Sub(time.Now()).
+func Until(t Time) Duration {
+	return t.Sub(Now())
+}
+
 // AddDate returns the time corresponding to adding the
 // given number of years, months, and days to t.
 // For example, AddDate(-1, 2, 3) applied to January 1, 2011