Week Numbers 1861 in Costa Rica
Number of weeks in 1861 year is 52 weeks
Weeks are according Costa Rica calendar rules, Sunday first day and weeks are Sunday to Saturday
| Week # | From Date | To Date | Weeks from Now |
|---|---|---|---|
| Week 1 | December 30, 1860 | January 5, 1861 | passed 8618 weeks ago |
| Week 2 | January 6, 1861 | January 12, 1861 | passed 8617 weeks ago |
| Week 3 | January 13, 1861 | January 19, 1861 | passed 8616 weeks ago |
| Week 4 | January 20, 1861 | January 26, 1861 | passed 8615 weeks ago |
| Week 5 | January 27, 1861 | February 2, 1861 | passed 8614 weeks ago |
| Week 6 | February 3, 1861 | February 9, 1861 | passed 8613 weeks ago |
| Week 7 | February 10, 1861 | February 16, 1861 | passed 8612 weeks ago |
| Week 8 | February 17, 1861 | February 23, 1861 | passed 8611 weeks ago |
| Week 9 | February 24, 1861 | March 2, 1861 | passed 8610 weeks ago |
| Week 10 | March 3, 1861 | March 9, 1861 | passed 8609 weeks ago |
| Week 11 | March 10, 1861 | March 16, 1861 | passed 8608 weeks ago |
| Week 12 | March 17, 1861 | March 23, 1861 | passed 8607 weeks ago |
| Week 13 | March 24, 1861 | March 30, 1861 | passed 8606 weeks ago |
| Week 14 | March 31, 1861 | April 6, 1861 | passed 8605 weeks ago |
| Week 15 | April 7, 1861 | April 13, 1861 | passed 8604 weeks ago |
| Week 16 | April 14, 1861 | April 20, 1861 | passed 8603 weeks ago |
| Week 17 | April 21, 1861 | April 27, 1861 | passed 8602 weeks ago |
| Week 18 | April 28, 1861 | May 4, 1861 | passed 8601 weeks ago |
| Week 19 | May 5, 1861 | May 11, 1861 | passed 8600 weeks ago |
| Week 20 | May 12, 1861 | May 18, 1861 | passed 8599 weeks ago |
| Week 21 | May 19, 1861 | May 25, 1861 | passed 8598 weeks ago |
| Week 22 | May 26, 1861 | June 1, 1861 | passed 8597 weeks ago |
| Week 23 | June 2, 1861 | June 8, 1861 | passed 8596 weeks ago |
| Week 24 | June 9, 1861 | June 15, 1861 | passed 8595 weeks ago |
| Week 25 | June 16, 1861 | June 22, 1861 | passed 8594 weeks ago |
| Week 26 | June 23, 1861 | June 29, 1861 | passed 8593 weeks ago |
| Week 27 | June 30, 1861 | July 6, 1861 | passed 8592 weeks ago |
| Week 28 | July 7, 1861 | July 13, 1861 | passed 8591 weeks ago |
| Week 29 | July 14, 1861 | July 20, 1861 | passed 8590 weeks ago |
| Week 30 | July 21, 1861 | July 27, 1861 | passed 8589 weeks ago |
| Week 31 | July 28, 1861 | August 3, 1861 | passed 8588 weeks ago |
| Week 32 | August 4, 1861 | August 10, 1861 | passed 8587 weeks ago |
| Week 33 | August 11, 1861 | August 17, 1861 | passed 8586 weeks ago |
| Week 34 | August 18, 1861 | August 24, 1861 | passed 8585 weeks ago |
| Week 35 | August 25, 1861 | August 31, 1861 | passed 8584 weeks ago |
| Week 36 | September 1, 1861 | September 7, 1861 | passed 8583 weeks ago |
| Week 37 | September 8, 1861 | September 14, 1861 | passed 8582 weeks ago |
| Week 38 | September 15, 1861 | September 21, 1861 | passed 8581 weeks ago |
| Week 39 | September 22, 1861 | September 28, 1861 | passed 8580 weeks ago |
| Week 40 | September 29, 1861 | October 5, 1861 | passed 8579 weeks ago |
| Week 41 | October 6, 1861 | October 12, 1861 | passed 8578 weeks ago |
| Week 42 | October 13, 1861 | October 19, 1861 | passed 8577 weeks ago |
| Week 43 | October 20, 1861 | October 26, 1861 | passed 8576 weeks ago |
| Week 44 | October 27, 1861 | November 2, 1861 | passed 8575 weeks ago |
| Week 45 | November 3, 1861 | November 9, 1861 | passed 8574 weeks ago |
| Week 46 | November 10, 1861 | November 16, 1861 | passed 8573 weeks ago |
| Week 47 | November 17, 1861 | November 23, 1861 | passed 8572 weeks ago |
| Week 48 | November 24, 1861 | November 30, 1861 | passed 8571 weeks ago |
| Week 49 | December 1, 1861 | December 7, 1861 | passed 8570 weeks ago |
| Week 50 | December 8, 1861 | December 14, 1861 | passed 8569 weeks ago |
| Week 51 | December 15, 1861 | December 21, 1861 | passed 8568 weeks ago |
| Week 52 | December 22, 1861 | December 28, 1861 | passed 8567 weeks ago |