Speak About:

Present

Past

Past to Present

Future

Abilities - Responsibilities

Asking Questions

Choosing the Right Phrase

Combining Verbs

Explaining Ideas

Describing Your World

Complex Ideas

Relating Ideas, People, Objects

Speaking about Objects

Wondering about Situations

Which Days

Days of The Week and Time Expressions

Days of the Week

Days of the week are capitalized.

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Example:

I'm going to submit the patent on Sunday.

On Wednesday I confirmed the book value.

When speaking about an action that is repeated every week on a specific day use the day of the week followed by 's'.

Mondays
Tuesdays
Wednesdays
Thursdays
Fridays
Saturdays
Sundays

Short-term debt is recalculated on Thursdays.

Because of when they run inventory, it is easiest to get the products off the shelf on Mondays.

The Weekend

British English: at the weekend OR at weekends (in general)
American English: on the weekend OR on weekends (in general)

Example:

I can't access my bank account on the weekend.

People like to have access to their bank account on the weekend.

Times of the Day

These time expressions express things that happen during the day. The exception to this form is 'at night'.

in the morning
in the afternoon
in the evening
at night

Example:

Each day in the afternoon we check the pre-tax profit of all our holdings.

Jim calculates pre-tax profit at night, to make sure all the figures have come in.

In / On time

'In time' expresses that something is done with sufficient time to meet a deadline.

Example:

The bank needs to convert the common trust fund into a mutual fund, in time to meet the tax deadline.

The buyer said their minimum payment would arrive in time.

'On time' indicates an action that takes place at the correct, scheduled time.

Example:

My flight was delayed, I won't make it to the family reunion on time.

The check was endorsed on time.