diff --git a/contrapunctus/cp-pem.el b/contrapunctus/cp-pem.el
new file mode 100644
index 0000000..69d8a2d
--- /dev/null
+++ b/contrapunctus/cp-pem.el
@@ -0,0 +1,10 @@
+(defun cp/pem-timestamp (date-time)
+  "Converts user input date and time to UNIX epoch time and
+inserts it after point.
+
+A timezone must be specified, or  MUST include the timezone!"
+  (interactive "sDate and time: ")
+  (insert
+   (format-time-string
+    "%s"
+    (date-to-time date-time))))