Looking on the internet deeply has found these results:

at dinner time is the most popular phrase on the web.

on dinner time 11,230 results on the web	at dinner time 12,290,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Roll on dinner time! Oyster and seafood posh pie with samphire. By James Martin For Weekend. Published: 17:30 EST, 29 January 2016 \| Updated: 13:04 EST, ... Roll on dinner time! Apple and sage porchetta. By James Martin For Weekend. Published: 17:31 EST, 29 January 2016 \| Updated: 12:42 EST, 30 January 2016. Roll on dinner time! Rump steak with creamy brioche leeks. By James Martin For Weekend. Published: 17:32 EST, 29 January 2016 \| Updated: 17:32 EST, ... Roll on dinner time! Singapore chilli crab with egg noodles. By James Martin For Weekend. Published: 17:31 EST, 29 January 2016 \| Updated: 09:43 EST, ...	She might have the decency not to phone him at dinner time. I'll come back at dinner time, then. And I'm going to eat dinner at dinner time. We are at dinner time and, if you did not go to the islands, in our outskirts there are lots of feasts and village festivals with typical dishes (game and very good fresh fish). Well, at dinner time, I said that it was an egg night. You do not want to be at my house at dinner time. I'll take the first train to Long Island. I'll be there at dinner time. But I'm not always home at dinner time.

on dinner time

11,230 results on the web

at dinner time

12,290,000,000 results on the web

More popular!

Roll on dinner time! Oyster and seafood posh pie with samphire. By James Martin For Weekend. Published: 17:30 EST, 29 January 2016 | Updated: 13:04 EST, ...
Roll on dinner time! Apple and sage porchetta. By James Martin For Weekend. Published: 17:31 EST, 29 January 2016 | Updated: 12:42 EST, 30 January 2016.
Roll on dinner time! Rump steak with creamy brioche leeks. By James Martin For Weekend. Published: 17:32 EST, 29 January 2016 | Updated: 17:32 EST, ...
Roll on dinner time! Singapore chilli crab with egg noodles. By James Martin For Weekend. Published: 17:31 EST, 29 January 2016 | Updated: 09:43 EST, ...

She might have the decency not to phone him at dinner time.
I'll come back at dinner time, then.
And I'm going to eat dinner at dinner time.
We are at dinner time and, if you did not go to the islands, in our outskirts there are lots of feasts and village festivals with typical dishes (game and very good fresh fish).
Well, at dinner time, I said that it was an egg night.
You do not want to be at my house at dinner time.
I'll take the first train to Long Island. I'll be there at dinner time.
But I'm not always home at dinner time.