Quotes about occasion
page 2

On his plans for his autobiography Laterna Magica, as quoted in "Who is he really?" http://www.ingmarbergman.se/universe.asp?guid=4F72F9D3-43BB-405D-B42B-3D091B8FAF3A
Source: The Magic Lantern
“I did deranged quite well, when the occasion called for it.”

“Getting yelled at by a furious woman should be a semi-formal occasion.”
Source: Belles on Their Toes

Albert Einstein in a letter to his cousin and second wife Elsa, during a visit to the University of Oxford, in collection donated to the Hebrew University of Jerusalem in Israel by Einstein's stepdaughter Margot, as quoted in "Einstein in no-sock shock" http://www.newscientist.com/article.ns?id=dn9555&feedId=online-news_rss20, New Scientist (15 July 2006)
Attributed in posthumous publications

“Are you smarter than a pig, Locke?”
“On occasion,” said Locke. “There are contrary opinions.”
Source: The Republic of Thieves
Source: It Happened One Autumn

Source: Letters of Thomas Jefferson

1960s, Remarks at the signing of the Immigration Bill (1965)

to the minister of England."
Ireland and America (1846)

About Queen Elizabeth II in a speech to crowds in Casemates Square on Gibraltar National Day 2013.
[12 September 2015, Gibraltar: Elizabeth “our Queen by invitation and not by imposition; twice voted”, http://en.mercopress.com/2015/09/12/gibraltar-elizabeth-our-queen-by-invitation-and-not-by-imposition-twice-voted, MercoPress, 20 October 2015]
2015

“True, I have lost money on many occasions. But I only play with money I can afford to lose.”
Rich Dad Poor Dad: What the Rich Teach Their Kids About Money-That the Poor and the Middle Class Do Not!

Source: The Tales of Alvin Maker, Alvin Journeyman (1995), Chapter 13.

Never Before Aired: Watch PART II of the debate between Finkelstein and Dershowitz http://www.normanfinkelstein.com/article.php?pg=11&ar=109 (archive located here http://web.archive.org/web/20120814094352/http://www.normanfinkelstein.com/never-before-aired-watch-part-ii-of-the-debate-between-finkelstein-and-dershowitz/ is a continuation of part 1 http://web.archive.org/web/20120910213955/http://www.democracynow.org/2003/9/24/scholar_norman_finkelstein_calls_professor_alan) published 2003-9-24

Statement by Liberal Party of Canada Leader Justin Trudeau on Christmas http://www.liberal.ca/statement-by-liberal-party-of-canada-leader-justin-trudeau-on-christmas/ (24 December 2014)
2014

Page 101
2000s, (2008)

Source: Elements of Refusal (1988), p. 108

"She may have lost a Picasso..." The Daily Express, 15 January 2001.

On Robert Gates in interview with Larry King. (February 2010) http://en.rian.ru/interview/20101202/161586625.html
2006- 2010

Letter to Abtzell February 12, 1526 (vi., 473), ibid, p.250-251

Source: J. A. Hobson's Imperialism: A Study: A Centennial Retrospective (2002), p. 8

Meteorological Observations and Essays: Mit Tabellen, 1834 p. 18

[President's Address, Debate on President's Address, Parliament of Singapore, http://sprs.parl.gov.sg/search/topic.jsp?currentTopicID=00062986-ZZ¤tPubID=00069476-ZZ&topicKey=00069476-ZZ.00062986-ZZ_1%2Bid005_19850301_S0005_T00051-president-address%2B, March 01 1985, January 16 2015]
1980s

Aligarh (Uttar Pradesh) . Hasan Nizami: Taju’l-Ma’sir, in Elliot and Dowson, Vol. II : Elliot and Dowson, History of India as told by its own Historians, 8 Volumes, Allahabad Reprint, 1964. pp. 224.
Letter https://books.google.com/books?id=hFE4AQAAMAAJ&pg=PA8 to Charles Calvert, 3rd Baron Baltimore (22 January 1677).
Source: Dream of the Red Chamber (1958), p. 38

Young India (24 April 1931), p. 274
1930s

1920s, Speech on the Anniversary of the Declaration of Independence (1926)

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 335.

1915 - 1925, Suprematism' in World Reconstruction (1920)

Letter to Abraham Lincoln on his Gettysburg Address (20 November 1863).

Page 166
Publications, The Shah's Story (1980), On Islam and the Islamic Revolution
he laughs
Jasper Johns Interviewed/ Jasper Johns interviewed Part II, Peter Fuller, Art Montly, London, August/September 1978
1970s
The Calcutta Quran Petition (1986)

Source: (1776), Book V, Chapter I, Part III, p. 820.

Speech https://books.google.com/books?id=HGM9AQAAMAAJ&pg=PA5172&lpg=PA5172&dq=%22Worse+than+any+heathen+or+pagan+abroad+are+those+in+our+midst+who+are+false+to+our+institutions.%22&source=bl&ots=n-wpUEfhND&sig=wHyJSOd8M1rswurZUUnUgAFrTn0&hl=en&sa=X&ved=0ahUKEwjXtt2swKjLAhWFGD4KHWCjBDsQ6AEIHDAA#v=onepage&q=%22Worse%20than%20any%20heathen%20or%20pagan%20abroad%20are%20those%20in%20our%20midst%20who%20are%20false%20to%20our%20institutions.%22&f=false (4 July 1870)

"For John F. Kennedy His Inauguration" (1960), the poem is also known as "Dedication". Frost had planned to read "For John F. Kennedy His Inauguration" at John F. Kennedy's imauguration, but the blinding light from the sun and snow prompted him to recite "The Gift Outright" from memory. Source: Tuten, Nancy Lewis; Zubizarreta, John (2001). The Robert Frost Encyclopedia. Greenwood Publishing Group, ISBN 9780313294648
General sources
Variant: Summoning artists to participate
In the august occasions of the state
Seems something artists ought to celebrate.

Address to the Lions Club of Jamshedpur, August 22, 1963.
Keynote: Excerpts from his speeches and chairman's statements to shareholders

Maria Mitchell: Life, Letters and Journals (illustrated) by Maria Mitchell, 1896, p. 189.

Speech at the handing over ceremony of Haresfield Beacon to the National Trust (10 January 1931), published in This Torch of Freedom (1935), p. 120.
1931

1920s, Ways to Peace (1926)

Bharatiya Pratinidhi Sabha Session- July, 18-19 1970, Chandigarh
Quotes from ataljee.org

1850s, Latter-Day Pamphlets (1850), Stump Orator (May 1, 1850)
In parliament, defending the proposed union of Ireland with Great Britain.
[Barrington, Jonah, Personal sketches and recollections of his own times, Chapter XVII https://archive.org/details/personalsketche06barrgoog]

pg. 291
The Sports and Pastimes of the People of England (1801), Bell ringing
Source: The Wizard of Zao (1978), Chapter 10 (p. 127)
Source: "Does the history of psychology have a future?." 1994, p. 472

http://books.google.com/books?id=FnAEAAAAYAAJ&q=%22I+own+it+is+a+common+saying+that+every+reverse+of+fortune+teaches+us+how+to+behave+on+another+occasion+but+that+is+not+true+as+the+circumstances+which+attend+each+event+are+different+and+such+as+could+not+be+foreseen%22&pg=PA321#v=onepage
Gli è ben vero che si dice Tu imparerai per un'altra volta: questo non vale perchè la vien sempre con modi diversi e non mai immaginati.
http://books.google.com/books?id=AIEOAAAAQAAJ&q=%22Gli+%C3%A8+ben+vero+che+si+dice+Tu+imparerai+per+un'altra+volta+questo+non+vale+perch%C3%A8+la+vien+sempre+con+modi+diversi+e+non+mai+immaginati%22&pg=PA181#v=onepage
Autobiography, vol. 2, ch. 9

Speech to the Birmingham branch of the Royal Regiment of Fusiliers Association (18 February 1989), from Enoch Powell on 1992 (Anaya, 1989), pp. 49-50
1980s
Sultlãn Jalãlu’d-Dîn Mankbarnî of Khwarîzm (AD 1222-1231) Thatta (Sindh)
Tãrîkh-i-Firishta

The Passing of the Armies: An account of the Army of the Potomac, based upon personal reminiscences of the Fifth Army Corps (1915), p. 260

Letter to Comrade Molotov for the Politburo (19 March 1922) http://www.ibiblio.org/expo/soviet.exhibit/ae2bkhun.html
Variant translation:
It is precisely now and only now, when in the starving regions people are eating human flesh, and hundreds if not thousands of corpses are littering the roads, that we can (and therefore must) carry out the confiscation of church valuables. … I come to the categorical conclusion that precisely at this moment we must give battle to the Black Hundred clergy in the most decisive and merciless manner and crush its resistance with such brutality that it will not forget it for decades to come. The greater the number of representatives of the reactionary clergy and reactionary bourgeoisie we succeed in executing for this reason, the better.
As translated in The Unknown Lenin : From the Secret Archive (1996) edited by Richard Pipes, pp. 152-4
1920s

1920s, The Reign of Law (1925)