When should tango Care send?
Email send timing for Year to date 2026 (1 Jan – 28 Oct), then optional recommendations generated from the delivered calendar: open rate and click-to-open for email, interaction rate for Teams DMs.
Best day & time to send
Mornings, 8-10am, outperform midday and early afternoon across the week.
Email sent early in the morning, Phoenix time, opens best: Monday 8-10am is the best-evidenced window, with Thursday and Friday at 9am close behind. Midday Wednesday is the clearest weak point. Every slot sits within a few points of the 75.3% average, so timing is a modest lever rather than a fix.
Email, manual sends only, Phoenix time (America/Phoenix). Average 75.3% open rate across 65,171 deliveries. Almost all email goes out at a set Phoenix hour (88.6% of set-time deliveries); Local Time sends perform the same, so the hours below read as Phoenix clock time.
| 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | |
|---|---|---|---|---|---|---|---|---|---|
| Monday | 79.3% | 76.6% | 77.4% | 74.0% | 76.7% | 69.9% | 82.1% | 74.3% | |
| Tuesday | 75.1% | 72.8% | 76.8% | 74.9% | 75.8% | 75.1% | 75.8% | 83.9% | 76.0% |
| Wednesday | 74.2% | 74.7% | 76.1% | 76.2% | 72.1% | 72.6% | 71.8% | ||
| Thursday | 73.3% | 76.9% | 73.2% | 75.8% | 73.3% | 73.6% | |||
| Friday | 73.7% | 77.2% | 73.5% | 72.5% | 73.3% | 92.9%† | 72.2% |
Each cell shows its email open rate; stronger shading means higher. † Fewer than 177 deliveries: dashed and left out of the shading and the rankings. pp = percentage points.
Best slots
| Slot | Open rate | Moments | Deliveries |
|---|---|---|---|
| Tuesday 14:00 | 83.9% | 1 | 335 |
| Monday 14:00 | 82.1% | 1 | 369 |
| Monday 08:00 | 79.3% | 8 | 1,564 |
| Monday 10:00 | 77.4% | 11 | 4,206 |
| Friday 09:00 | 77.2% | 10 | 3,961 |
| Thursday 09:00 | 76.9% | 9 | 3,560 |
Weakest slots
| Slot | Open rate | Moments | Deliveries |
|---|---|---|---|
| Monday 13:00 | 69.9% | 2 | 935 |
| Wednesday 15:00 | 71.8% | 1 | 373 |
| Wednesday 12:00 | 72.1% | 4 | 1,807 |
| Friday 15:00 | 72.2% | 1 | 443 |
| Friday 11:00 | 72.5% | 1 | 461 |
| Wednesday 13:00 | 72.6% | 1 | 449 |
What works
- Monday 8-10am leans strongest: 77.4% open rate across 29 moments and 9,539 deliveries, the most heavily tested window in the data. Favour it for sends that most need to be opened.
- Friday 9am and Thursday 9am also hold above average: 77.2% on 10 moments and 76.9% on 9 moments.
- Tuesday 2pm (83.9%) and Monday 2pm (82.1%) top the table on one moment each, so they are untested rather than proven.
What doesn't
- Wednesday 12-3pm is the clearest weak point: 72.1% open rate across 6 moments and 2,629 deliveries.
- Monday 1pm stands out low on its own: 69.9% across 2 moments, just after the strongest morning window.
- Thursday 10am trends below average at 73.2% across 10 moments.
Teams DM timing is directional only: few sends per time slot.
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