1 files changed, 17 insertions, 1 deletions
diff --git a/internal/template/functions.go b/internal/template/functions.go
index 97ca0f3d..f617029c 100644
--- a/internal/template/functions.go
+++ b/internal/template/functions.go
@@ -107,7 +107,8 @@ func (f *funcMap) Map() template.FuncMap {
 		"nonce": func() string {
 			return crypto.GenerateRandomStringHex(16)
 		},
-		"deRef": func(i *int) int { return *i },
+		"deRef":    func(i *int) int { return *i },
+		"duration": duration,
 
 		// These functions are overrode at runtime after the parsing.
 		"elapsed": func(timezone string, t time.Time) string {
@@ -160,6 +161,21 @@ func isEmail(str string) bool {
 	return err == nil
 }
 
+// Returns the duration in human readable format (hours and minutes).
+func duration(t time.Time) string {
+	if t.IsZero() {
+		return ""
+	}
+
+	diff := time.Until(t)
+
+	if diff < 0 {
+		return ""
+	}
+
+	return diff.String()
+}
+
 func elapsedTime(printer *locale.Printer, tz string, t time.Time) string {
 	if t.IsZero() {
 		return printer.Printf("time_elapsed.not_yet")