diff --git a/index.html b/index.html
index e1c7699..093ec12 100644
--- a/index.html
+++ b/index.html
@@ -168,9 +168,12 @@
     if (agent.indexOf('msie')>0 || agent.indexOf('trident')>0) {
         alert("Internet Explorer には対応していません");
     }
-    today = new Date(Date.now());
-    today_str = today.getFullYear() + "/" + ("0"+(today.getMonth() + 1)).slice(-2,3) + "/" + (today.getDate());
-    document.querySelector("#input_01").value = today_str;
+    var datepick = document.querySelector("#input_01");
+    if (datepick.value == "") {
+	    today = new Date(Date.now());
+	    today_str = today.getFullYear() + "/" + ("0"+(today.getMonth() + 1)).slice(-2,3) + "/" + (today.getDate());
+	    datepick.value = today_str;
+    }
     timechanged();
     filter();