diff --git a/src/main/java/org/codelibs/fess/helper/SystemHelper.java b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
index b307c816c..1f790ceb2 100644
--- a/src/main/java/org/codelibs/fess/helper/SystemHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/SystemHelper.java
@@ -29,6 +29,7 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
+import java.util.Calendar;
 import java.util.Date;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
@@ -36,6 +37,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
+import java.util.TimeZone;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -107,11 +109,19 @@ public class SystemHelper {
 
     protected String productVersion;
 
+    protected long eolTime;
+
     @PostConstruct
     public void init() {
         if (logger.isDebugEnabled()) {
             logger.debug("Initialize {}", this.getClass().getSimpleName());
         }
+        final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
+        cal.set(2021, 6 - 1, 2);
+        eolTime = cal.getTimeInMillis();
+        if (isEoled()) {
+            logger.error("Your system is out of service. See https://fess.codelibs.org/eol.html");
+        }
         updateSystemProperties();
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         filterPathEncoding = fessConfig.getPathEncoding();
@@ -398,10 +408,20 @@ public class SystemHelper {
     public void setupAdminHtmlData(final TypicalAction action, final ActionRuntime runtime) {
         runtime.registerData("developmentMode", ComponentUtil.getFessEsClient().isEmbedded());
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
-        final String url = fessConfig.getOnlineHelpInstallation();
-        runtime.registerData("installationLink", getHelpUrl(url));
+        final String installationLink = fessConfig.getOnlineHelpInstallation();
+        runtime.registerData("installationLink", getHelpUrl(installationLink));
         runtime.registerData("storageEnabled",
                 StringUtil.isNotBlank(fessConfig.getStorageEndpoint()) && StringUtil.isNotBlank(fessConfig.getStorageBucket()));
+        final boolean eoled = isEoled();
+        runtime.registerData("eoled", eoled);
+        if (eoled) {
+            final String eolLink = fessConfig.getOnlineHelpEol();
+            runtime.registerData("eolLink", getHelpUrl(eolLink));
+        }
+    }
+
+    protected boolean isEoled() {
+        return getCurrentTimeAsLong() > eolTime;
     }
 
     public String getSearchRoleByUser(final String name) {
diff --git a/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java b/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
index 8ee984031..df2b5bdd6 100644
--- a/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
+++ b/src/main/java/org/codelibs/fess/mylasta/action/FessLabels.java
@@ -2880,6 +2880,9 @@ public class FessLabels extends UserMessages {
     /** The key of the message: Running as Development mode. For production use, please install a standalone elasticsearch server. */
     public static final String LABELS_development_mode_warning = "{labels.development_mode_warning}";
 
+    /** The key of the message: Your system is out of service. See EOL page. */
+    public static final String LABELS_eol_error = "{labels.eol_error}";
+
     /** The key of the message: Advance */
     public static final String LABELS_ADVANCE = "{labels.advance}";
 
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
index a0aa22248..09c1b1629 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
@@ -1209,6 +1209,9 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     /** The key of the configuration. e.g. https://fess.codelibs.org/{lang}/{version}/install/install.html */
     String ONLINE_HELP_INSTALLATION = "online.help.installation";
 
+    /** The key of the configuration. e.g. https://fess.codelibs.org/{lang}/eol.html */
+    String ONLINE_HELP_EOL = "online.help.eol";
+
     /** The key of the configuration. e.g. failureurl */
     String ONLINE_HELP_NAME_FAILUREURL = "online.help.name.failureurl";
 
@@ -5394,6 +5397,13 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
      */
     String getOnlineHelpInstallation();
 
+    /**
+     * Get the value for the key 'online.help.eol'. <br>
+     * The value is, e.g. https://fess.codelibs.org/{lang}/eol.html <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getOnlineHelpEol();
+
     /**
      * Get the value for the key 'online.help.name.failureurl'. <br>
      * The value is, e.g. failureurl <br>
@@ -8428,6 +8438,10 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             return get(FessConfig.ONLINE_HELP_INSTALLATION);
         }
 
+        public String getOnlineHelpEol() {
+            return get(FessConfig.ONLINE_HELP_EOL);
+        }
+
         public String getOnlineHelpNameFailureurl() {
             return get(FessConfig.ONLINE_HELP_NAME_FAILUREURL);
         }
@@ -9366,6 +9380,7 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             defaultMap.put(FessConfig.SCHEDULER_MONITOR_INTERVAL, "30");
             defaultMap.put(FessConfig.ONLINE_HELP_BASE_LINK, "https://fess.codelibs.org/{lang}/{version}/admin/");
             defaultMap.put(FessConfig.ONLINE_HELP_INSTALLATION, "https://fess.codelibs.org/{lang}/{version}/install/install.html");
+            defaultMap.put(FessConfig.ONLINE_HELP_EOL, "https://fess.codelibs.org/{lang}/eol.html");
             defaultMap.put(FessConfig.ONLINE_HELP_NAME_FAILUREURL, "failureurl");
             defaultMap.put(FessConfig.ONLINE_HELP_NAME_ELEVATEWORD, "elevateword");
             defaultMap.put(FessConfig.ONLINE_HELP_NAME_REQHEADER, "reqheader");
diff --git a/src/main/resources/fess_config.properties b/src/main/resources/fess_config.properties
index e9a081d9b..a7914dd9b 100644
--- a/src/main/resources/fess_config.properties
+++ b/src/main/resources/fess_config.properties
@@ -675,6 +675,7 @@ scheduler.monitor.interval=30
 #                                                     ------
 online.help.base.link=https://fess.codelibs.org/{lang}/{version}/admin/
 online.help.installation=https://fess.codelibs.org/{lang}/{version}/install/install.html
+online.help.eol=https://fess.codelibs.org/{lang}/eol.html
 online.help.name.failureurl=failureurl
 online.help.name.elevateword=elevateword
 online.help.name.reqheader=reqheader
diff --git a/src/main/resources/fess_label.properties b/src/main/resources/fess_label.properties
index d7c744159..36d004ed5 100644
--- a/src/main/resources/fess_label.properties
+++ b/src/main/resources/fess_label.properties
@@ -951,6 +951,7 @@ labels.esreq_button_upload=Send
 labels.facet_is_not_found=No match
 labels.doc_score=Score:
 labels.development_mode_warning=Running as Development mode. For production use, please install a standalone elasticsearch server.
+labels.eol_error=Your system is out of service. See EOL page.
 labels.advance=Advance
 labels.advance_search_title=Advanced Search
 labels.advance_search_must_queries=All these words
diff --git a/src/main/resources/fess_label_en.properties b/src/main/resources/fess_label_en.properties
index d7c744159..36d004ed5 100644
--- a/src/main/resources/fess_label_en.properties
+++ b/src/main/resources/fess_label_en.properties
@@ -951,6 +951,7 @@ labels.esreq_button_upload=Send
 labels.facet_is_not_found=No match
 labels.doc_score=Score:
 labels.development_mode_warning=Running as Development mode. For production use, please install a standalone elasticsearch server.
+labels.eol_error=Your system is out of service. See EOL page.
 labels.advance=Advance
 labels.advance_search_title=Advanced Search
 labels.advance_search_must_queries=All these words
diff --git a/src/main/resources/fess_label_ja.properties b/src/main/resources/fess_label_ja.properties
index 1f171dab1..93a7b847e 100644
--- a/src/main/resources/fess_label_ja.properties
+++ b/src/main/resources/fess_label_ja.properties
@@ -951,6 +951,7 @@ labels.esreq_button_upload=送信
 labels.facet_is_not_found=該当なし
 labels.doc_score=スコア:
 labels.development_mode_warning=開発モードで起動しています。本運用環境ではElasticsearchを別途インストールしてください。
+labels.eol_error=ご利用のシステムはサポートが終了しています。製品サポート期限のページを参照して、再インストールしてください。
 labels.advance=詳細検索
 labels.advance_search_title=詳細検索
 labels.advance_search_must_queries=すべての単語を含む
diff --git a/src/main/webapp/WEB-INF/view/common/admin/header.jsp b/src/main/webapp/WEB-INF/view/common/admin/header.jsp
index 61b501699..3a6a2ace3 100644
--- a/src/main/webapp/WEB-INF/view/common/admin/header.jsp
+++ b/src/main/webapp/WEB-INF/view/common/admin/header.jsp
@@ -17,10 +17,15 @@
 		<!-- Navbar Right Menu -->
 		<div class="navbar-custom-menu">
 			<ul class="nav navbar-nav">
+				<c:if test="${eoled}">
+				<li data-toggle="tooltip" data-placement="left" title="<la:message
+					key="labels.eol_error" />">
+					<a href="${eolLink}" target="_olh"><em class="fas fa-times-circle" style="color:yellow;"></em></a></li>
+				</c:if>
 				<c:if test="${developmentMode}">
 				<li data-toggle="tooltip" data-placement="left" title="<la:message
 					key="labels.development_mode_warning" />">
-					<a href="${installationLink}" target="_olh"><em class="fa fa-exclamation-triangle"></em></a></li>
+					<a href="${installationLink}" target="_olh"><em class="fa fa-exclamation-triangle" style="color:yellow;"></em></a></li>
 				</c:if>
 				<li><a href="${contextPath}/"><em class="fa fa-list-alt"></em></a></li>
 				<c:if test="${fe:permission('admin-scheduler')}">