Calendario enero de 1981
| S | lun | mar | mié | jue | vie | sáb | dom |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 3 | 4 | |||
| 2 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 3 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 4 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 5 | 26 | 27 | 28 | 29 | 30 | 31 |
Vista anual 1981 · S: número de semana ISO
| S | lun | mar | mié | jue | vie | sáb | dom |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 3 | 4 | |||
| 2 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 3 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 4 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 5 | 26 | 27 | 28 | 29 | 30 | 31 |
Vista anual 1981 · S: número de semana ISO