When referring to something happening on a certain date or day of the week, often you can eliminate the word “on.”
Due to the holiday, our weekly team meeting will be held Tuesday.
The meeting with the Ministry of Oil will be held Jan. 21.
There are, of course, exceptions to this rule, and generally these involve clearing up any misunderstandings.
He told Joe on Friday that the compressor would be down for routine maintenance.
In this case, “He told Joe Friday” might bring to mind memories of Dragnet TV shows.
Another exception would be to avoid confusion as to which of two events actually happen on that date.
The tender board approved a contract to begin construction of the gas processing plant Wednesday.
(They are not going to begin construction Wednesday; the tender board approved the contract Wednesday.)
The tender board approved on Wednesday a contract to begin construction of the gas processing plant.