diff --git a/glicid/services/ntp.scm b/glicid/services/ntp.scm
new file mode 100644
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--- /dev/null
+++ b/glicid/services/ntp.scm
@@ -0,0 +1,100 @@
+(define-module (glicid services ntp)
+               #:use-module (gnu packages bash)
+               #:use-module (gnu packages ntp)
+               #:use-module (gnu services)
+               #:use-module (gnu services shepherd)
+               #:use-module (gnu system shadow)
+               #:use-module (guix)
+               #:use-module (guix build utils)
+               #:use-module (guix records)
+               #:use-module (ice-9 match)
+               #:use-module (glicid utils)
+               #:export (
+                         chronyd-configuration
+                         chronyd-configuration?
+                         chronyd-shepherd-service
+                         chronyd-service-type
+                         %default-chrony-conf
+                         %chrony-group
+                         %chrony-account
+                         %chrony-accounts
+                         ))
+
+(define %default-chrony-conf
+  (plain-file "chrony.conf" "
+              pool pool.ntp.org iburst
+              driftfile /var/lib/chrony/drift
+              ntsdumpdir /var/lib/chrony
+              leapsectz right/UTC
+              makestep 1.0 3
+              rtcsync
+              keyfile /etc/chrony/chrony.keys
+              "))
+
+(define %chrony-group
+  (user-group
+    (name "chrony")
+    (system? #t)))
+
+(define %chrony-account
+  (user-account
+    (name "chrony")
+    (group "chrony")
+    (system? #t)
+    (comment "chrony server user")
+    (uid 969)
+    (home-directory "/var/lib/chrony")
+    (shell (file-append bash "/bin/bash"))))
+
+(define %chrony-accounts
+  (list %chrony-group %chrony-account))
+
+(define-record-type* 
+  <chronyd-configuration>
+  chronyd-configuration make-chronyd-configuration
+  chronyd-configuration?
+  (chronyd-pkg chronyd-pkg (default chrony))
+  (config-file config-file (default %default-chrony-conf))
+  (pid-file pid-file (default "/var/run/chrony/chronyd.pid"))
+  (log-file log-file (default "/var/log/chrony/chrony.log")))
+
+(define chronyd-shepherd-service
+  (match-lambda
+    (($ <chronyd-configuration> chronyd-pkg config-file pid-file log-file )
+     (list
+       (shepherd-service
+         (provision '(chronyd))
+         (documentation "Run chronyd.")
+         (requirement '(user-processes))
+         (respawn? #t)
+         (start #~(make-forkexec-constructor
+                    (list
+                      #$(file-append chronyd-pkg "/sbin/chronyd")
+                      "-d"
+                      "-f" #$config-file
+                      )
+                    #:pid-file #$pid-file 
+                    #:log-file #$log-file))
+         (stop #~(make-kill-destructor)))))))
+
+(define %chronyd-activation
+  #~(begin
+      (unless (file-exists? "/etc/chrony/chrony.keys")
+        (mkdir-p "/etc/chrony")
+        (touch "/etc/chrony/chrony.keys"))
+      (mkdir-p "/var/run/chrony")
+      (mkdir-p "/var/lib/chrony")
+      (mkdir-p "/var/log/chrony")
+      (chown "/var/run/chrony" (passwd:uid (getpwnam "chrony")) (passwd:gid (getpwnam "chrony")))
+      (chown "/var/lib/chrony" (passwd:uid (getpwnam "chrony")) (passwd:gid (getpwnam "chrony")))
+      (chown "/var/log/chrony" (passwd:uid (getpwnam "chrony")) (passwd:gid (getpwnam "chrony")))
+      (chmod "/var/run/chrony" #o770)
+      #t))
+
+(define chronyd-service-type
+  (service-type 
+    (name 'chronyd)
+    (extensions (list
+                  (service-extension shepherd-root-service-type chronyd-shepherd-service)
+                  (service-extension activation-service-type (const %chronyd-activation))))
+    (description "Run chronyd.")))