## Contents

- Send Time Optimization
- General Benchmarks
- Real Optimization Strategy

## Send Time Optimization

### General Benchmarks

| Day | Open Rate | Best For |
|-----|-----------|----------|
| Tuesday | Highest | B2B newsletters, product updates |
| Wednesday | High | B2B, educational content |
| Thursday | High | B2B, promotional |
| Monday | Medium | Weekly digests, fresh-start content |
| Friday | Lower | Casual content, weekend prep |
| Weekend | Lowest (B2B) / OK (B2C) | B2C promotions, lifestyle |

| Time (Recipient's TZ) | Best For |
|------------------------|----------|
| 6:00-7:00 AM | Early readers, commuters |
| 9:00-10:00 AM | B2B desktop readers, start-of-day |
| 12:00-1:00 PM | Lunch break readers (B2C especially) |
| 5:00-6:00 PM | End-of-day, commute home |
| 8:00-9:00 PM | B2C evening browsing |

### Real Optimization Strategy

1. **Start with benchmarks** above
2. **A/B test send times** — test 2-hour windows against each other
3. **Use send-time optimization** if your ESP offers it (Mailchimp, Klaviyo, etc.)
4. **Segment by timezone** — don't send at 10 AM EST to someone in PST (that's 7 AM)
5. **Check your own data** — your audience may defy benchmarks

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