diff --git a/jupyter_server/prometheus/metrics.py b/jupyter_server/prometheus/metrics.py
index ff7152329..3f1f7b5d7 100644
--- a/jupyter_server/prometheus/metrics.py
+++ b/jupyter_server/prometheus/metrics.py
@@ -58,6 +58,9 @@
     "Jupyter Server Extensiom Version Information",
     ["name", "version", "enabled"],
 )
+LAST_ACTIVITY = Gauge("jupyter_server_last_activity_timestamp_seconds", "Timestamp of last seen activity on this Jupyter Server")
+SERVER_STARTED = Gauge("jupyter_server_started_timestamp_seconds", "Timestamp of when this Jupyter Server was started")
+ACTIVE_DURATION = Gauge("jupyter_server_active_duration_seconds", "Number of seconds this Jupyter Server has been active")
 
 __all__ = [
     "HTTP_REQUEST_DURATION_SECONDS",
diff --git a/jupyter_server/serverapp.py b/jupyter_server/serverapp.py
index ca8bc9874..560c18fd3 100644
--- a/jupyter_server/serverapp.py
+++ b/jupyter_server/serverapp.py
@@ -110,7 +110,7 @@
     GatewaySessionManager,
 )
 from jupyter_server.log import log_request
-from jupyter_server.prometheus.metrics import SERVER_EXTENSION_INFO, SERVER_INFO
+from jupyter_server.prometheus.metrics import SERVER_EXTENSION_INFO, SERVER_INFO, SERVER_STARTED, LAST_ACTIVITY, ACTIVE_DURATION
 from jupyter_server.services.config import ConfigManager
 from jupyter_server.services.contents.filemanager import (
     AsyncFileContentsManager,
@@ -2708,6 +2708,12 @@ def init_metrics(self) -> None:
                 name=ext.name, version=ext.version, enabled=str(ext.enabled).lower()
             )
 
+        started = self.web_app.settings["started"]
+        SERVER_STARTED.set(started.timestamp())
+
+        LAST_ACTIVITY.set_function(lambda: self.web_app.last_activity().timestamp())
+        ACTIVE_DURATION.set_function(lambda: (self.web_app.last_activity() - self.web_app.settings["started"]).total_seconds())
+
     @catch_config_error
     def initialize(
         self,