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:
The Conference on Humanitarian Affairs provided many learning opportunities last Wednesday.
I'm transcending every causal relationship next Tuesday.
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
Most people give to charity on Sundays.
We publish in-depth interviews on Wednesdays.
The Weekend
British English: at the weekend OR at weekends (in general)
American English: on the weekend OR on weekends (in general)
Example:
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
at night
Example:
Alan Hynek donates his time to civil society organizations in the evenings.
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.
Example:
This industrialized country will convert to sustainable technologies in time to survive.
Make sure to get there in time for his presentation about the indirect benefits of internet technologies.
'On time' indicates an action that takes place at the correct, scheduled time.
Example:
We converted our infrastructure on time.
Our code of ethics was reconfigured on time.