Timing is crucial when sending e-newsletters!
Constant Contact recently updated its general trends chart of 
the best times to send your e-newsletters. The send times in the chart below are general industry guidelines.
As of October 2018 to December 2018:
| Business Type | Day of Week | Time of Highest Open Rate (Local Time) |
| Accommodations (e.g., hotel, inn, B&B, campgrounds) | Monday | 4:00 p.m. |
| Accountant | Tuesday | 8:00 p.m. |
| Animal Services | Thursday | 12:00 a.m. |
| Art, Culture, Entertainment (e.g., galleries, museums, musicians, theatre, film, crafts) | Tuesday | 8:00 p.m. |
| Automotive Services | Wednesday | 8:00 p.m. |
| Child Care Services | Monday | 6:00 p.m. |
| Civic/Social Membership (e.g., associations, chambers, clubs) | Monday | 8:00 p.m. |
| Consultant, Training (e.g., marketing, management) | Friday | 2:00 a.m. |
| Education – Primary/Secondary (e.g., elementary, middle, and high schools) | Monday | 3:00 p.m. |
| Education – Higher Education (e.g., colleges, universities, trade schools) | Tuesday | 8:00 p.m. |
| Financial Advisor | Tuesday | 8:00 p.m. |
| Fitness Center, Recreation (e.g., yoga studio, bowling alley, gym) | Sunday | 10:00 p.m. |
| Fitness/Nutritional Services (e.g., personal trainer, wellness coach) | Sunday | 8:00 p.m. |
| Government Agency or Services | Wednesday | 8:00 p.m. |
| Health & Social Services (e.g., hospital, elder care, adoption services) | Monday | 4:00 p.m. |
| Health Professional (e.g., physician, dentist, chiropractor) | Wednesday | 9:00 p.m. |
| Home & Building Services (e.g., construction, HVAC, landscaping, design) | Wednesday | 8:00 p.m. |
| Insurance | Tuesday | 6:00 p.m. |
| Legal Services | Tuesday | 4:00 p.m. |
| Manufacturing and Distribution | Wednesday | 6:00 p.m. |
| Marketing, Advertising, Public Relations | Tuesday | 4:00 p.m. |
| Other | Monday | 4:00 p.m. |
| Other – Non-profit | Wednesday | 3:00 p.m. |
| Personal Services (e.g., dry cleaning, photography, housekeeping) | Monday | 9:00 p.m. |
| Professional Services | Tuesday | 3:00 p.m. |
| Publishing | Monday | 3:00 p.m. |
| Real Estate | Wednesday | 9:00 p.m. |
| Religious Organization | Tuesday | 9:00 p.m. |
| Restaurant, Bar, Cafe, Caterer | Tuesday | 10:00 p.m. |
| Retail (e.g., brick and mortar and online) | Wednesday | 1:00 a.m. |
| Salon, Spa, Barber (e.g., nails, tanning) | Wednesday | 1:00 a.m. |
| Technology (e.g., web developer) | Tuesday | 4:00 p.m |
| Transportation | Monday | 7:00 p.m. |
| Travel and Tourism (e.g., limo driver, tour guide, reservations) | Monday | 4:00 p.m. |
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