Use no article

We do not use an article before plural or uncountable nouns to talk about something in general.

I don’t drink milk.

Women drive more cautiously than men.

Compare:

I love music. 

I loved the music at the party. 

Children are often difficult. 

They are a nice family. The children are very funny.

Meals

We do not use an article before the names of meals: breakfast, lunch, or dinner.

Dinner is served at 8.

I always have breakfast with my children.

Years, months and days

We do not use an article before names of years, months and days of the week.

Friday is my favourite day of the week.

I think 2020 will be an excellent year.

TV

We do not use an article with TV (when used as a broadcasting service, NOT as an appliance)

I saw it on TV.

I don’t watch TV.

Turn off the TV. I’ve bought a new TV.

Names of languages and school subjects

We do not use an article before the names of languages and school subjects.

He doesn’t speak English.

I study biology. 

Next, last

We do not use an article before next and last + time expression (when they mean before or after now).

The meeting is next Thursday.

I saw him last week.

Compare:

Last year we spent one week in London.

We really loved London. The last day we were really sad. 

What a fantastic idea!

Yesterday was such a horrible day!

This is such a difficult problem!

Thanks, you are such a good friend.