in december 21st vs on december 21st

The correct phrase is 'on December 21st.' The preposition 'on' is used to indicate a specific date. 'In December 21st' is incorrect because 'in' isn't the appropriate preposition to use with a specific date.

Explained by Miss E.
Editor at TextRanch

Last updated: March 23, 2025 • 5489 views

'In December 21st' is incorrect. The preposition 'in' is not used with specific dates.

"in december 21st"

Incorrect usage. Use 'on December 21st' instead to indicate a specific date.

Show examples from the web [+]

December 21st, 2005, was the day of my appeal.
We stayed there until December 21st.
Basketball, invented by Dr James Naismith, was first played on December 21st, 1891.
It looks like the world didn't end on December 21st after all.
like on December 21st, when Sandy Adams was supposed to work on Christmas and you let her off in exchange for a foot rub.
The reenactment will be held on the day of the battle, December the 21st.
So... it's the 21st December and we're in London.
21st December, 1949, is the 70th birthday of the great Stalin.
Mr. Barroso also referred to the lifting of Schengen border checks for new Member States as of the 21st of December.
Now the victims, and we've seen many, are said to have adhered to the Mayan-Quiche calender, which predicts the end of time to occur on the 21st December of this year, due to the suns destructive forces.
If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second in June - a tiny fraction of the year.
Divide 100 by ten, the percentage of Americans that believe the world will end on the 21st of December, and you get ten...
For the purposes of Art 4(4)(a) of the First Council Directive 89/104 of 21st December 1988, where:
It is the 21st of December, the world has not ended, and we are all still here,
If we want to ensure that corporate social responsibility continues into the 21st century there needs to be dialogue with the whole community, and for this reason in December we held a multi-stakeholder forum on corporate social responsibility.
The European Council endorsed the Commission proposal in December 2006.
The project ended in December 2006.
The third payment was released in December.
Turkey obtained candidate status following the Helsinki European Council in December 1999.
These guidelines were last reviewed in December 2009.

'On December 21st' is the correct phrase. The preposition 'on' is used to indicate a specific date.

"on december 21st"

Correct usage. Use 'on December 21st' to specify a particular date.

Show examples from the web [+]

It looks like the world didn't end on December 21st after all.
like on December 21st, when Sandy Adams was supposed to work on Christmas and you let her off in exchange for a foot rub.
Basketball, invented by Dr James Naismith, was first played on December 21st, 1891.
Now the victims, and we've seen many, are said to have adhered to the Mayan-Quiche calender, which predicts the end of time to occur on the 21st December of this year, due to the suns destructive forces.
Divide 100 by ten, the percentage of Americans that believe the world will end on the 21st of December, and you get ten...
December 21st, 2005, was the day of my appeal.
We stayed there until December 21st.
The reenactment will be held on the day of the battle, December the 21st.
So... it's the 21st December and we're in London.
21st December, 1949, is the 70th birthday of the great Stalin.
Mr. Barroso also referred to the lifting of Schengen border checks for new Member States as of the 21st of December.
If you represent the Earth's lifetime by a single year, say from January when it was made to December, the 21st-century would be a quarter of a second in June - a tiny fraction of the year.
For the purposes of Art 4(4)(a) of the First Council Directive 89/104 of 21st December 1988, where:
It is the 21st of December, the world has not ended, and we are all still here,
But then everything changed on December 7th.
It closed on December 20, 1965.
The first flower bloomed on December 28th.
On December 14, twelve FBI agents entered Japan.
He died in Aachen on December 21, 1998.
On December 4, 1926, he married Maybelle.

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in december 21st vs on december 21st

"in december 21st"

"on december 21st"

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