diff --git a/bundles/bootshorn/files/temperature b/bundles/bootshorn/files/temperature
index 9d73780..0599ce5 100755
--- a/bundles/bootshorn/files/temperature
+++ b/bundles/bootshorn/files/temperature
@@ -32,7 +32,12 @@ print(f"@{temperature_date}: {temperature}°C")
 
 filename = temperature_date.strftime("%Y-%m-%d_00-00-00.000000%z") + ".log"
 logpath  = os.path.join(TEMPERATURE_LOG_DIR, filename)
+now_utc = datetime.datetime.now(datetime.timezone.utc)
 
 with open(logpath, "a+", newline="") as logfile:
     writer = csv.writer(logfile)
-    writer.writerow([temperature_date.strftime('%Y-%m-%d_%H-%M-%S.%f%z'), temperature])
\ No newline at end of file
+    writer.writerow([
+        now_utc.strftime('%Y-%m-%d_%H-%M-%S.%f%z'), # current UTC time
+        temperature_date.strftime('%Y-%m-%d_%H-%M-%S.%f%z'), # date of temperature reading
+        temperature,
+    ])
\ No newline at end of file
diff --git a/bundles/bootshorn/metadata.py b/bundles/bootshorn/metadata.py
index 1dd1eee..3ef8876 100644
--- a/bundles/bootshorn/metadata.py
+++ b/bundles/bootshorn/metadata.py
@@ -25,7 +25,7 @@ defaults = {
     'systemd-timers': {
         'bootshorn-temperature': {
             'command': '/opt/bootshorn/temperature',
-            'when': '*:0/5',
+            'when': '*:0/10',
             'working_dir': '/opt/bootshorn',
             'user': 'ckn',
             'group': 'ckn',