Events in August 1840
| MonMonday | TueTuesday | WedWednesday | ThuThursday | FriFriday | SatSaturday | SunSunday |
|---|
| 2727 July 1840 | 2828 July 1840 | 2929 July 1840 | 3030 July 1840 | 3131 July 1840 | 11 August 1840 | 22 August 1840 |
| 33 August 1840 | 44 August 1840 | 55 August 1840 | 66 August 1840 | 77 August 1840 | 88 August 1840 | 99 August 1840 |
| 1010 August 1840 | 1111 August 1840 | 1212 August 1840 | 1313 August 1840 | 1414 August 1840 | 1515 August 1840 | 1616 August 1840 |
| 1717 August 1840 | 1818 August 1840 | 1919 August 1840 | 2020 August 1840 | 2121 August 1840 | 2222 August 1840 | 2323 August 1840 |
| 2424 August 1840 | 2525 August 1840 | 2626 August 1840 | 2727 August 1840 | 2828 August 1840 | 2929 August 1840 | 3030 August 1840 |
| 3131 August 1840 | 11 September 1840 | 22 September 1840 | 33 September 1840 | 44 September 1840 | 55 September 1840 | 66 September 1840 |