Correct clock time adjustment

Hello guys,
yesterday I set my clock to the right time via the following commands:
date -s 00:00
hwclock --systohc
Today I recognized that there is already a difference of three minutes to the right time. I know that isn't much but nevertheless I want to know the reason for that.
Is that normal?
Thank you in advance.
orschiro

Hardware clocks are not accurate in computers. They run from a battery when the computer is not connected to an outside source.
You can use openntpd or ntp to synchronize your hardware clock to the internet. ArchWiki article: http://wiki.archlinux.org/index.php/Ntpd

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