December calendar| Day | December | Day of the year | Week number of year |
|---|
| Wednesday | Dec 1, 2066 | 334 | 48 |
| Thursday | Dec 2, 2066 | 335 | 48 |
| Friday | Dec 3, 2066 | 336 | 48 |
| Saturday | Dec 4, 2066 | 337 | 48 |
| Sunday | Dec 5, 2066 | 338 | 48 |
| Monday | Dec 6, 2066 | 339 | 49 |
| Tuesday | Dec 7, 2066 | 340 | 49 |
| Wednesday | Dec 8, 2066 | 341 | 49 |
| Thursday | Dec 9, 2066 | 342 | 49 |
| Friday | Dec 10, 2066 | 343 | 49 |
| Saturday | Dec 11, 2066 | 344 | 49 |
| Sunday | Dec 12, 2066 | 345 | 49 |
| Monday | Dec 13, 2066 | 346 | 50 |
| Tuesday | Dec 14, 2066 | 347 | 50 |
| Wednesday | Dec 15, 2066 | 348 | 50 |
| Thursday | Dec 16, 2066 | 349 | 50 |
| Friday | Dec 17, 2066 | 350 | 50 |
| Saturday | Dec 18, 2066 | 351 | 50 |
| Sunday | Dec 19, 2066 | 352 | 50 |
| Monday | Dec 20, 2066 | 353 | 51 |
| Tuesday | Dec 21, 2066 | 354 | 51 |
| Wednesday | Dec 22, 2066 | 355 | 51 |
| Thursday | Dec 23, 2066 | 356 | 51 |
| Friday | Dec 24, 2066 | 357 | 51 |
| Saturday | Dec 25, 2066 | 358 | 51 |
| Sunday | Dec 26, 2066 | 359 | 51 |
| Monday | Dec 27, 2066 | 360 | 52 |
| Tuesday | Dec 28, 2066 | 361 | 52 |
| Wednesday | Dec 29, 2066 | 362 | 52 |
| Thursday | Dec 30, 2066 | 363 | 52 |
| Friday | Dec 31, 2066 | 364 | 52 |
