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:
He applied for the patent on Friday.
I'm going to submit the patent on Sunday.
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:
All deposits made on the weekend will be registered in personal accounts on the next business day.
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.
The bank posts any interest rate changes in the afternoon.
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.
A common trust fund was set up just in time one year prior to Mr. Smith's death.
'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 customer needs to endorse their check and mail it in on time, otherwise they will have to pay a late fee.