=TODAY()+21| from October 8 | Thursday, October 29, 2026 |
| from October 9 | Friday, October 30, 2026 |
| from October 10 | Saturday, October 31, 2026 |
| from October 11 | Sunday, November 1, 2026 |
| from October 12 | Monday, November 2, 2026 |
| from October 13 | Tuesday, November 3, 2026 |
21 days from today is Wednesday, October 28, 2026.
21 days from today falls on a Wednesday.
21 days from now is Wednesday, October 28, 2026 — "from now" and "from today" mean the same thing here, counting from today's date.
21 days is 3 weeks.