diff --git a/pkgs/racket-test/tests/racket/date.rkt b/pkgs/racket-test/tests/racket/date.rkt
new file mode 100644
index 0000000000..30debe01a7
--- /dev/null
+++ b/pkgs/racket-test/tests/racket/date.rkt
@@ -0,0 +1,9 @@
+#lang racket/base
+(require racket/date rackunit)
+;; test that German hours & minutes are separated with a colon, not a period
+(check-equal? (parameterize ([date-display-format 'german])
+                (date->string
+                 (seconds->date
+                  (find-seconds 30 45 2 1 1 1970))
+                 #t))
+              "1. Januar 1970, 02:45")