diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Animation.java b/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
index 7284e52..30034be 100644
--- a/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Animation.java
@@ -4,8 +4,10 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import org.ntlab.acanthus_server.models.Accounts;
 import org.ntlab.acanthus_server.models.Gallery;
+import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
 
 import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Date;
@@ -20,7 +22,7 @@
     private String description;
     private Boolean isPublic;
     @JsonProperty("createdDate")
-    private LocalDateTime createdDate;
+    private String createdDate;
     @JsonProperty("lastUpdate")
     private String lastUpdate;
     @JsonProperty("likes")
@@ -42,9 +44,14 @@
     private boolean isDummy;
 
     public Animation(Integer aid, String name, Account owner) {
+
+        LocalDateTime date = LocalDateTime.now();
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
+        //　↑　　"yyyy/MM/dd HH:mm:ss"という形の日付を表示させるための前処理
+
         this.aid = aid;
         this.name = name;
-        this.createdDate = LocalDateTime.now();
+        this.createdDate = date.format(dateTimeFormatter);
         this.isPublic = false;
         this.owner = owner;
         this.editors.add(new Editor(owner, true));
@@ -124,7 +131,7 @@
         return invites;
     }
 
-    public LocalDateTime getCreatedDate(){return createdDate;}
+    public String getCreatedDate(){return createdDate;}
 
     //-----------------------------------------------------------------
     // remover
@@ -189,7 +196,10 @@
         this.owner = ownerAccount;
         this.editors.add(new Editor(owner, true));
         this.pageMap.put(0, new Page());
-        this.createdDate = LocalDateTime.now();
+
+        LocalDateTime date = LocalDateTime.now();
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy/MM/dd HH:mm:ss");
+        this.createdDate = date.format(dateTimeFormatter);
 
         //this.lastAccess = LocalDateTime.of(2015, 12, 15,  0,  0);