diff --git a/src/clj/pmagnus/btcdata/web/routes/api.clj b/src/clj/pmagnus/btcdata/web/routes/api.clj
index 7a29ca3..c18f149 100644
--- a/src/clj/pmagnus/btcdata/web/routes/api.clj
+++ b/src/clj/pmagnus/btcdata/web/routes/api.clj
@@ -144,8 +144,13 @@
          :headers {"Content-Type" "application/json"}
          :body    (json/write-str {:error "Invalid date format, use YYYY-MM-DD"})}))))
 
+(def ^:private ohlc-fmt
+  (java.time.format.DateTimeFormatter/ofPattern "yyyy-MM-dd HH:mm:ss"))
+
 (defn- ohlc-row->map [r]
   {:ts          (:ts r)
+   :datetime    (.format (.atOffset (java.time.Instant/ofEpochSecond (:ts r))
+                                    java.time.ZoneOffset/UTC) ohlc-fmt)
    :open        (str (:open r))
    :high        (str (:high r))
    :low         (str (:low r))