on December vs at december

Some examples from the web:

• It was released in Philadelphia, probably on December 13, 1996.
• We got our first panel out on December third.
• I note that this point remained open after the Ecofin Council meeting on December 1.
• It's 6:24 a.m. on December 30th on the Cosmic Calendar.
• And two months later on December 17th, Orville Wright powered the first airplane across a beach in North Carolina.
• In 1996, he shot himself in the head on December ninth - which incidentally is Judi Dench's birthday.
• This one was taken on December 11, 1972, and it is the most commonly published photograph in all of history.
• He will arrive on December 31st 1999 together with His earthly counterpart on the 11:30 flight from Rome to New York.
• Uichi Shinkai died on December 11, 1954
• In fact, demolition work on this hotel began on December 1st, 1967.
• Her first entry was on December 17.
• There's a full moon on December 5 only every 23 years.
• Early this week Thanksgiving the last meeting of the editors is on December 17.
• But then everything changed on December 7th.
• The first flower bloomed on December 28th.
• It closed on December 20, 1965.
• Both were in snowy winter, first on December 31st.
• According to medical records, Hollis Eckhart was born on December 5.
• Arthur Leigh Allen was born on December 18th.
• The point taken by the Luxembourg Presidency on December 2 in the economic committee has our agreement.

Some examples from the web:

• c. EUR [...] billion at December 2010
• This is an estimated gross maximum that would be required to be covered under the State guarantee; the net exposure at December 2010 was EUR [...] million.
• Net present value at December 2002 discounted at 5,4 % nominal.
• The risk free rate is considered to be the Central Bank current account rate (3,75 % at December 2011).
• Abdul Raqib Takhari was a member of the Taliban Supreme Council responsible for Takhar and Badakhshan Provinces as at December 2009.
• As at December 2008 HSH was present in 21 major financial centres in Europe, Asia and America.
• As at December 2003, 17 Commission decisions were made for parts of the system approved in a country, each of which conferred management of aid on a provisional basis.
• In International Financial Reporting Standards, including International Accounting Standards and Interpretations, applicable at December 2003:
• In International Financial Reporting Standards, including International Accounting Standards and Interpretations, applicable at December 2003, references to the current version of IAS 27 Consolidated Financial Statements and Accounting for Investments in Subsidiaries are amended to IAS 27 Consolidated and Separate Financial Statements.
• Under article 5 of the proposal, both the definitive calculation of the amount of the correction and its financing by Member States for the year t are based on data on VAT bases and GNI known at December of year t+2.
• This estimated figure of EUR [...] billion is an estimated gross maximum that would be required to be covered under the State guarantee, the net exposure at December 2010 was EUR [...] million.
• As at December 2010, it had a turnover of EUR 389 million, with total assets of EUR 1 billion, and at 31 March 2011 it had capital of EUR 32 million and 7 branches.
• Member of Taliban Supreme Council responsible for Takhar and Badakhshan provinces as at December 2009, (b) Believed to be in Afghanistan/Pakistan border area, (c) Belongs to Tajik ethnic group.
• Address: Syrian Arab Republic (located in as at December 2014).
• However, the Facility has not entered into any hedge accounting transactions as at December 31, 2008 and 2009.
• However, the Investment Facility has not entered into any hedge accounting transactions as at December 31, 2007.
• Conversion into EUR is made using the official exchange rate at December 31, 2004.
• At December 31, 2005 | Contract Notional Amount | Negative Fair Value |
• It was a pleasure to listen to Commissioner Hübner's speech this morning, in which she made specific commitments to the effect that we can look forward to a new framework as early as at December's informal Council.
• In International Financial Reporting Standards, including International Accounting Standards and Interpretations, applicable at December 2003, references to the current version of IAS 28 Accounting for Investments in Associates are amended to IAS 28 Investments in Associates.