Days of The Week and Time Expressions
Days of the Week
Days of the week are capitalized.
I'm reviewing the case study on Friday.
I'm going to a presentation about human rights violations in US prisons on Tuesday.
When speaking about an action that is repeated every week on a specific day use the day of the week followed by 's'.
We abandon the pretense of impartiality on Saturdays.
Most people give to charity on Sundays.
British English: at the weekend OR at weekends (in general)
American English: on the weekend OR on weekends (in general)
We'll meet to go over information about the full impact on the weekend.
Let's give to our favorite charity on Sunday.
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
Michael usually participates in civic engagement in the early morning.
We usually examine every indicator in the afternoon.
In / On time
'In time' expresses that something is done with sufficient time to meet a deadline.
This industrialized country will convert to sustainable technologies in time to survive.
Make sure to contain the spill in time to protect the clean drinking water.
'On time' indicates an action that takes place at the correct, scheduled time.
The institutions collapsed on time.
We converted our infrastructure on time.