How to say on 9the of January or in 9th of January ? Which isthe differences ?
In this sentences I don't know which preposition put with 9th of January ??????
Please can Yopu help me in this question ?
In 9th of January in 2007 Tokyo accepted a decision to alter Defense agency to Defense Ministry which gave jurisdiction to government to act more drastically in emergency situation and enhance the role of influence on the decision of external policy.

Question

How to say on 9the of January or in 9th of January ? Which isthe differences ? 
In this sentences I don't know which preposition put with 9th of January  ??????
Please can Yopu help me in this question ? 
In 9th of January in 2007 Tokyo accepted a decision to alter Defense agency to Defense Ministry which gave jurisdiction to government to act more drastically in emergency situation and enhance the role of influence on the decision of external policy.

Answer

In this sentence I don't know which preposition to put / use  with  the 9th of January.
Please can you help me with this question?

On January 9th, 2007, Tokyo decided to upgrade the Defence Agency to the Defence Ministry, giving the government greater power to act more decisively in emergency situations and enhancing its influence in foreign policy decision making.

Use on with days; on Tuesday, on Thursdays
Use on with dates: on Tuesday, 23rd June; on 22nd June, 1987; on June 22, 1988

Use in with months: in January
Use in with years: in 2007
Use in with decades: in the 1980s

Answer

on the 9th of January
That is how we speak, but we write it differently. We write:
On 9 January.