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The most popular email day of the year for retailers, based on percent of retailers tracked via RetailEmail.Blogspot

• Dec. 26, 2006, Tuesday, the day after Christmas - 53.1%
• Dec. 11, 2006, Monday, 14 days before Christmas - 49.0%
• Dec. 15, 2006, Friday, 10 days before Christmas - 45.9%
• Dec. 18, 2006, Monday, 7 days before Christmas - 44.9%
• April 17, 2007, Tuesday, Tax Day - 43.7%
• Nov. 27, 2006, Monday, the Monday after Thanksgiving Day (Cyber Monday) and 28 days before Christmas - 43.7%
• Dec. 4, 2006, Monday, 21 days before Christmas - 42.1%
• Dec. 8, 2006, Friday, 17 days before Christmas - 42.1%
• April 24, 2007, Tuesday, 19 days before Mother's Day - 40.2%
• June 5, 2007, Tuesday, 12 days before Father's Day - 40.0%

- Email Experience Council/RetailEmail.Blogspot,
"The Most Popular Email Days of the Year For Retailers" (July 12, 2007)

Tuesday was retailers' favorite day to email, followed by Thursday, Monday, Friday, Wednesday, Sunday and Saturday. While 33% of retailers email on Tuesdays, only 8% sent emails on Saturdays. - Email Experience Council/RetailEmail.Blogspot, "Choosing The Best Day Of The Week To Email" (July 5, 2007)

The highest open rates (read rates) during Q2 2007 were Wednesday (27%), Monday (26%) and Thursday (26%). - eROI, "Email Marketing Statistics By Day and Time" (July 2007)

The highest click through rates during Q2 2007 were Wednesday and Thursday (5%).- eROI, "Email Marketing Statistics By Day and Time" (July 2007)

11am and 4pm scored the highest marks for business hour open rates (30%) and click through rates (5%).- eROI, "Email Marketing Statistics By Day and Time" (July 2007)

The highest peaks for read rates were 9 p.m. and 11 p.m.--with rates of 40% and 45%, as compared with workday rates between 24% and 30%. - eROI, "Email Marketing Statistics By Day and Time" (July 2007)

Click-through rates were between 4% and 5% during the workday, peaking at 7% at both 9 p.m. and 4 a.m. - eROI, "Email Marketing Statistics By Day and Time" (July 2007)

Saturday and Sunday have highest open rates (38.3% and 37.1% respectively). - eROI Email Statistics (Q2 2006)

Monday had the highest week-day open rate - 35.7%. - eROI Email Statistics (Q2 2006)

Thursday and Saturday lead in click rates (5.2% and 5.4% respectively). - eROI Email Statistics (Q2 2006)

Highest percent of click rates take place around the lunch hour - 6.2% CTR at noon. - eROI Email Statistics (Q2 2006)

The times that perform the best for read rates bookend the work day. - eROI Email Statistics (Q2 2006)

B2B recipients overwhelmingly prefer email on Monday and Tuesday. - eROI Email Statistics (Q2 2006)

Friday and Wednesday for consumers. - eROI Email Statistics (Q2 2006)

Consumers are getting an average of 35 emails a day. - Jupiter Research (2006)

Business recipients get nearly 100 per day. - Jupiter Research (2006)