“At Monday” or “on Monday”: which is correct?
The short answer
The correct preposition to use before days of the week is on, so the correct phrase is on Monday.
Why people get it wrong
People may make this error due to confusion over which prepositions to use with different time expressions. At is used for specific times (at 3 pm), while on is used for days and dates (on Monday, on June 5th). Non-native speakers might overgeneralize the use of at or be influenced by their native language structures.
What kind of mistake it is
It is a grammatical error involving the incorrect use of the preposition at in time expressions. Specifically, at is incorrectly used before a day of the week, where on is the correct preposition in English.
Examples with on Monday
- I will start my new job on Monday.
- The meeting is scheduled on Thursday.
- We have a family dinner on Sunday.
Quick check
I will start my new job .
The correct preposition to use before days of the week is on, so the correct phrase is on Monday.
Spotted a mistake in this article? Tell us