synchronize time

[Patrick Dupre]

Hello,

I am runing chrony
chronyd.service - NTP client/server
      Loaded: loaded (/lib/systemd/system/chronyd.service; enabled)
      Active: active (running) since Mon, 27 Feb 2012 22:42:01 +0100; 
35min ago
    Main PID: 4150 (chronyd)
      CGroup: name=systemd:/system/chronyd.service
    	  └ 4150 /usr/sbin/chronyd -u chrony

but my clock is still not on time.
How can I synchronize is manually (before I sued to do ntpdate 
time.server.

Thank.