Set Time Automatic update for Raspberry Pi

Go to http://support.ntp.org/bin/view/Servers/NTPPoolServers to get server for your region

Then

# nano /etc/ntp.conf

Edit server list by replace server for your region

server 0.th.pool.ntp.org iburst

server 1.th.pool.ntp.org iburst

Restart ntp daemon

# sudo /etc/init.d/ntp restart

Test

# date 

Thu Feb 26 21:54:58 ICT 2015