Llevo ya un tiempo dandole vueltas, al tema de que hay dias, que las ventas de fotografias en Istockphoto bajan de una manera asombrosa, muchas veces, por simple casualidad, y otras veces, por el hecho de que es fiesta nacional en los pasises que mas demandan fotografia en dicha agencia ( U.S.A. , alemania, Japon, etc ) asi que buscando un poco de informacion al respecto, encontre esta lista en la web de Yuri Arcus ( Posiblemente el fotografo con mayor numero de ventas en agencias de Microstock ) que puede sernos muy util:

Jan 01: New Year’s Day(hangovers)
Jan 02: 0.60 (more hangovers)
Jan 03: 0.7 (startup slowdown for the whole first week of the new year)
Jan 04: 0.86 (startup slowdown for the whole first week of the new year)
Jan 05: 0.76 (startup slowdown for the whole first week of the new year)
Jan 06: 0.84
Jan 07: 0.83 (Christmas Day for Orthodox Christians in Russia and about another 15 countries)
Jan 08: 0.88
Jan 09: 0.9
Jan 10: 0.95
Jan 11: 0.9
Jan 19: Martin Luther King, Jr.’s birthday (USA)
Jan 26: Australia Day ( Australia )

Feb 02: Groundhog Day ( USA )
Feb 14: Valentine’s Day ( USA and more countries )
Feb 16: President’s Day (USA)

March 17: St. Patrick’s Day
March 20: 0.9 (NCAA men’s college basketball tournament in US begins Thursday March 19 and runs through Sunday March 22)
March 21: 0.75
March 23: 0.6
March 24: 0.8 (the day after Easter. (day off in many countries.))

April 25: ANZAC Day (this is a memorial day to commemorate fallen soldiers)(Australia).

May 1: 0.95 (The first weekend in May is a big event in Britain. May 1st is also ‘Labour Day in most countries)
May 2: 0.90
May 3: 0.95 (Independence Day in Poland and Greenery day (Midori no hi) in Japan, part of the Golden week)
May 4: 0.85
May 28: 0.5 (Memorial Day (USA)? – last Monday in May (officially May 30)

Jun 14: Flag Day ( USA )

Jul 2: 0.82
Jul 3: 0.8
Jul 4: 0.75 (Independence Day—USA)
Jul 5: 0.82
Jul 6: 0.84

Aug 21: 1.05
Aug 22: 1.05

Sep 3: 0.8
Sep 7: 0.85 (Labor Day in the USA)

Oct 3: 0.8 (Day of German unity)
Oct 4: 0,8
Oct 9: 1.1
Oct 12: Columbus Day ( USA )
Oct 24: 1.05
Oct 25: 1.05

Nov 11: Veteran’s Day ( USA )
Nov 26: 0.80 (National holiday in Japan,…what is it called and Thanksgiving Day)

Dec 17: 0.95
Dec 18: 0.95
Dec 19: 0.95
Dec 20: 0.9
Dec 21: 0.85
Dec 22: 0.6 (Revolution Day or something in Russia)
Dec 23: 0.36
Dec 24: 0.18 (Christmas Eve – The big thing in Europe)
Dec 25: 0.082 (Christmas Morning – The big thing in the USA)
Dec 26: 0.35 (Day off in most countries)
Dec 27: 0.5 (Day off in most countries)
Dec 28: 0.67
Dec 29: 0.8
Dec 30: 0.5
Dec 31: 0.35

Enlace al post de Yuri Arcus