Defining relative clauses with where, when etc.	

Christmas is a time which many people take a holiday	Christmas is a time when many people take a holiday	
Hollywood is a place in America where live many movie stars.	Hollywood is a place in America where many movie stars live.	
We visited a wildlife park where there were elephants and giraffes.	We visited a wildlife park where had elephants and giraffes.	
We arrived at the airport at the same time the President was arriving.	We arrived at the airport at the same time when the President was arriving.	
Sunday morning is a time that I like to stay in bed late.	Sunday morning is a time when I like to stay in bed late.	
That's the house he was born in.	That's the house which he was born.	
It was the year when the war started.	It was the year the war started.	
The bar we usually go to is closed.	The bar where we usually go to is closed.	
I'll take you to the restaurant we had our annual dinner.	I'll take you to the restaurant where we had our annual dinner.	
It's a time which I like to take a short nap.	It's a time when I like to take a short nap.	
It's the kind of place you can fall in love with.	It's the kind of place where you can fall in love with.	
It's the time of the year we're usually busiest.	It's the time of the year when we're usually busiest.