The last time I saw Tom was (on) Thursday evening.

[diamondcutter]

The last time I saw Tom was Thursday evening.
The last time I saw Tom was on Thursday evening.

(by me)

I wonder which sentence is correct, the one with the preposition ‘on’, the one without ‘on’ or both.

 

[Rover_KE]

They're both correct and mean the same to me.

 

[diamondcutter]

Thanks, Rover.

What about these two sentences? Are they both correct?

Tom’s birthday is October 1st.
Tom’s birthday is on October 1st.

 

[emsr2d2]

Yes.

 

[jutfrank]

What about these two sentences? Are they both correct?

Tom’s birthday is October 1st.
Tom’s birthday is on October 1st.

I don't like the second one. Tom's birthday is not an event that happens on that day—it is that day.

 

[emsr2d2]

I look at that version as meaning that his birthday is on that day every year! I realise that's kind of patently obvious but ...!