Clock Issue

I am new to Ubuntu and just recently installed it on my Dell. I am having an issue with the clock time though. Everytime I shut down Ubuntu and open it again, my clock is three hours ahead. I change it back but it continues to do the same thing every time I shut it down and open it again.

Does anyone know why this is happening/how to fix it? Thanks!

re:clock

is your computer constantly connected to the internet ? and you could try system update i had that problem but i did a system update and that sorted it out for me hope this helps :)