| New moon | Dec 11, 839 | |
| Waxing crescent | from Dec 12, 839 to Dec 17, 839 | |
| Moon first quarter | Dec 18, 839 | |
| Growing moon | from Dec 19, 839 to Dec 24, 839 | |
| Full moon | Dec 25, 839 | |
| Waning moon | from Dec 26, 839 to Jan 1, 840 | |
| Moon third quarter | Jan 2, 840 | |
| Waning crescent | from Jan 3, 840 to Jan 9, 840 |
| New moon | Jan 10, 840 | |
| Waxing crescent | from Jan 11, 840 to Jan 16, 840 | |
| Moon first quarter | Jan 17, 840 | |
| Growing moon | from Jan 18, 840 to Jan 23, 840 | |
| Full moon | Jan 24, 840 | |
| Waning moon | from Jan 25, 840 to Jan 31, 840 | |
| Moon third quarter | Feb 1, 840 | |
| Waning crescent | from Feb 2, 840 to Feb 8, 840 |