Days of The Week and Time Expressions
Days of the Week
Days of the week are capitalized.
I'm shipping these batches on Tuesday.
I'm buying that ingredient on Monday.
When speaking about an action that is repeated every week on a specific day use the day of the week followed by 's'.
Most employees here don't see management on Saturdays.
You can't trust your first impressions about anything on Mondays.
British English: at the weekend OR at weekends (in general)
American English: on the weekend OR on weekends (in general)
They serve fresh bagels on the weekend.
I don't want to go over our ordering and purchase process 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
The motel usually asks customers to check out in the morning.
The travel agent usually makes reservations in the afternoon.
In / On time
'In time' expresses that something is done with sufficient time to meet a deadline.
We need to update our menu items in time for the winter holidays.
If you hurry you'll get this into storage in time.
'On time' indicates an action that takes place at the correct, scheduled time.
We turned over all receipts for our alcohol sales on time.
We altered our nutrition practices on time to abide by the new law.