diff --git a/src/babillard.ml b/src/babillard.ml
index 72e0c9a..29695a2 100644
--- a/src/babillard.ml
+++ b/src/babillard.ml
@@ -217,21 +217,20 @@ let () =
 let parse_image image =
   match image with
   | None -> Ok None
-  | Some image -> (
-    let image =
-      match image with
-      | Some image_name, image_content, alt ->
-        (Dream.html_escape image_name, image_content, Dream.html_escape alt)
-      | None, image_content, alt ->
+  | Some (name, content, alt) ->
+    let name =
+      match name with
+      | Some name -> Dream.html_escape name
+      | None ->
         (* make up random name if no name was given *)
-        let image_name = Uuidm.to_string (Uuidm.v4_gen random_state ()) in
-        (image_name, image_content, Dream.html_escape alt)
+        Uuidm.to_string (Uuidm.v4_gen random_state ())
     in
-    match image with
-    | _, image_content, alt ->
-      if not (is_valid_image image_content) then Error "invalid image"
-      else if String.length alt > 1000 then Error "Image description too long"
-      else Ok (Some image) )
+    if not (is_valid_image content) then
+      Error "invalid image"
+    else if String.length alt > 1000 then
+      Error "Image description too long"
+    else
+      Ok (Some (name, content, alt))
 
 (*TODO switch to markdown !*)
 (* insert html into the comment, and keep tracks of citations :
diff --git a/src/bindings.ml b/src/bindings.ml
index cae77cf..5a6f374 100644
--- a/src/bindings.ml
+++ b/src/bindings.ml
@@ -11,4 +11,4 @@ let ( let^ ) o f =
   | Error e -> Error (Format.sprintf "db error: %s" (Caqti_error.show e))
   | Ok x -> f x
 
-let ( let* ) o f = match o with Error e -> Error e | Ok x -> f x
+let ( let* ) o f = Result.fold ~ok:f ~error:Result.error o
diff --git a/src/js/dune b/src/js/dune
index 01be854..d23bebe 100644
--- a/src/js/dune
+++ b/src/js/dune
@@ -8,7 +8,7 @@
 (library
  (name js_pretty_post)
  (modules js_pretty_post)
- (libraries js_of_ocaml brr)
+ (libraries js_of_ocaml brr unix)
  (preprocess
   (pps js_of_ocaml-ppx)))
 
diff --git a/src/js/js_pretty_post.ml b/src/js/js_pretty_post.ml
index 9ad6464..66bf5f0 100644
--- a/src/js/js_pretty_post.ml
+++ b/src/js/js_pretty_post.ml
@@ -31,25 +31,17 @@ let image_click post_image event =
 
 let render_time date_span =
   log "render time@.";
-  let unix_time =
+  let t =
     float_of_int
       (Jv.to_int
          (Jv.call date_span "getAttribute" [| Jv.of_string "data-time" |]) )
   in
-  (*use float because int overflow*)
-  let time_millisecs = 1000.0 *. unix_time in
-  let date_constructor = Jv.get Jv.global "Date" in
-  let date = Jv.new' date_constructor [| Jv.of_float time_millisecs |] in
-  let year = Jv.to_int @@ Jv.call date "getFullYear" [||] in
-  (*the month is 0-indexed*)
-  let month = (Jv.to_int @@ Jv.call date "getMonth" [||]) + 1 in
-  let day = Jv.to_int @@ Jv.call date "getDate" [||] in
-  let hour = Jv.to_int @@ Jv.call date "getHours" [||] in
-  let min = Jv.to_int @@ Jv.call date "getMinutes" [||] in
-  let date_string =
-    Format.sprintf "%02d-%02d-%02d %02d:%02d" year month day hour min
+  let t = Unix.localtime t in
+  let date =
+    Format.sprintf "%02d-%02d-%02d %02d:%02d" (1900 + t.tm_year) (1 + t.tm_mon)
+      t.tm_mday t.tm_hour t.tm_min
   in
-  ignore @@ Jv.set date_span "innerHTML" (Jv.of_string date_string)
+  ignore @@ Jv.set date_span "innerHTML" (Jv.of_string date)
 
 let make_pretty _ =
   log "make pretty@.";