in early September vs on early September

The correct phrase is 'in early September.' 'In' is the preposition commonly used to indicate a period of time, such as a month. 'On' is used for specific dates or days.

Last updated: March 25, 2024 • 8100 views

in early September

This phrase is correct and commonly used in English.

Use 'in early September' when referring to the month of September in a general sense.

Examples:

In early September, the weather starts to cool down.
We are planning a trip in early September.
The event is scheduled to take place in early September.

Show examples from the web [+]

I should like to recall that this change was initiated by the Watson Report in early September.
Turkish military officials reported in early September that air and artillery strikes in August had killed 145 to 160 PKK fighters in Iraq's autonomous Kurdish region.
It started in early September last year.
Deported to Sobibor in early September 1943 with other Jews, also Red Army soldiers,
So very little time elapsed between their arrival at Sobibor in early September and the uprising on October 14?
In early September 1998 short-term funding problems became particularly severe for one of the largest hedge funds - Long-Term Capital Management (LTCM).
In violation of the terms of the CoHA as detailed above, Jok Riak reportedly sought to have tanks repaired and modified for use against opposition forces in early September 2014.
When we last debated the situation in Iraq in early September, the world seemed on the brink of a unilateral military adventure led by the United States.
The Committee on Foreign Affairs, Human Rights, Common Security and Defence Policy will then start preparing the amendments to the draft budget with a view to adoption in early September.
The Commission met its formal commitment by presenting the conclusions of this impact assessment to the Committee on Economic and Monetary Affairs in early September, as agreed.
As far as the PPE Group is concerned, these are the ingredients for the legislative proposals you are to present to us in early September.
At the request of the European Parliament's Committee on Budgets, in early September I signed the working paper with all the detailed technical explanations and financial figures about that proposal.
The Turkish Chief of General Staff, General Necdet Ozel, and other top commanders inspected troops in south-eastern Anatolia in early September, raising expectations that the Turkish military might be preparing for a ground offensive in northern Iraq.
Finally, with regard to the secret detention facilities mentioned in a speech by the President of the United States of America in early September, I wish to reassure Parliament that the Council is aware of the possible implications.
This is in spite of the fact that, in early September, I warned European governments, the Commission, the US Government and the UN Secretary-General that the regime might be planning the selective repression of Ethiopian opposition leaders.
We'd already been in Minsk for some months... when one night... in early September, 1943, we were woken when the lights were suddenly switched on, and our huts were -
In early September, Mom and Dad got a call from the Annandale police notifying them that Chris' abandoned car had been identified by the Arizona Highway Patrol.
In early September this year the EU Youth Conference organised by the Polish Presidency put forward recommendations on cooperation between young people from the EU and neighbouring countries.
In early September 2010, the German Government overturned the consensual decision made 10 years ago by the Socialist/Green coalition to end the use of nuclear power for good.
In early September a number of Turkish Cypriot youths expressed their wish for the withdrawal from Cyprus of the Turkish army of occupation by writing relevant slogans on walls in the Turkish-occupied northern part of the island.

Alternatives:

in late September
in mid-September
in early October
in September
during early September

on early September

This phrase is incorrect in English. 'On' is not used to refer to a month in this context.

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in early September vs on early September