| New moon | Dec 29, 840 | |
| Waxing crescent | from Dec 30, 840 to Jan 5, 841 | |
| Moon first quarter | Jan 6, 841 | |
| Growing moon | from Jan 7, 841 to Jan 11, 841 | |
| Full moon | Jan 12, 841 | |
| Waning moon | from Jan 13, 841 to Jan 19, 841 | |
| Moon third quarter | Jan 20, 841 | |
| Waning crescent | from Jan 21, 841 to Jan 27, 841 |
| New moon | Jan 28, 841 | |
| Waxing crescent | from Jan 29, 841 to Feb 3, 841 | |
| Moon first quarter | Feb 4, 841 | |
| Growing moon | from Feb 5, 841 to Feb 10, 841 | |
| Full moon | Feb 11, 841 | |
| Waning moon | from Feb 12, 841 to Feb 18, 841 | |
| Moon third quarter | Feb 19, 841 | |
| Waning crescent | from Feb 20, 841 to Feb 26, 841 |