For everyone that always wonders when the servers will be online, Or how long a patch will take here is a very useful Website
Just set your home city in the first drop box :
Then set Riots city which is : U.S.A - California - Los Angeles
Click the Red button And it will tell you what time it is were you are and what time it is were Riot is, Then you simply Follow this next step.
Click Your Start button on your computer:
Click All Programs
Do the Simple Math and bang you have your Answer:
At the specified time, local time in Los Angeles was 3 hours behind Toronto
Hope This helps.