Week Numbers 1981 in Costa Rica
Number of weeks in 1981 year is 53 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 28, 1980 | January 3, 1981 | passed 2289 weeks ago |
| Week 2 | January 4, 1981 | January 10, 1981 | passed 2288 weeks ago |
| Week 3 | January 11, 1981 | January 17, 1981 | passed 2287 weeks ago |
| Week 4 | January 18, 1981 | January 24, 1981 | passed 2286 weeks ago |
| Week 5 | January 25, 1981 | January 31, 1981 | passed 2285 weeks ago |
| Week 6 | February 1, 1981 | February 7, 1981 | passed 2284 weeks ago |
| Week 7 | February 8, 1981 | February 14, 1981 | passed 2283 weeks ago |
| Week 8 | February 15, 1981 | February 21, 1981 | passed 2282 weeks ago |
| Week 9 | February 22, 1981 | February 28, 1981 | passed 2281 weeks ago |
| Week 10 | March 1, 1981 | March 7, 1981 | passed 2280 weeks ago |
| Week 11 | March 8, 1981 | March 14, 1981 | passed 2279 weeks ago |
| Week 12 | March 15, 1981 | March 21, 1981 | passed 2278 weeks ago |
| Week 13 | March 22, 1981 | March 28, 1981 | passed 2277 weeks ago |
| Week 14 | March 29, 1981 | April 4, 1981 | passed 2276 weeks ago |
| Week 15 | April 5, 1981 | April 11, 1981 | passed 2275 weeks ago |
| Week 16 | April 12, 1981 | April 18, 1981 | passed 2274 weeks ago |
| Week 17 | April 19, 1981 | April 25, 1981 | passed 2273 weeks ago |
| Week 18 | April 26, 1981 | May 2, 1981 | passed 2272 weeks ago |
| Week 19 | May 3, 1981 | May 9, 1981 | passed 2271 weeks ago |
| Week 20 | May 10, 1981 | May 16, 1981 | passed 2270 weeks ago |
| Week 21 | May 17, 1981 | May 23, 1981 | passed 2269 weeks ago |
| Week 22 | May 24, 1981 | May 30, 1981 | passed 2268 weeks ago |
| Week 23 | May 31, 1981 | June 6, 1981 | passed 2267 weeks ago |
| Week 24 | June 7, 1981 | June 13, 1981 | passed 2266 weeks ago |
| Week 25 | June 14, 1981 | June 20, 1981 | passed 2265 weeks ago |
| Week 26 | June 21, 1981 | June 27, 1981 | passed 2264 weeks ago |
| Week 27 | June 28, 1981 | July 4, 1981 | passed 2263 weeks ago |
| Week 28 | July 5, 1981 | July 11, 1981 | passed 2262 weeks ago |
| Week 29 | July 12, 1981 | July 18, 1981 | passed 2261 weeks ago |
| Week 30 | July 19, 1981 | July 25, 1981 | passed 2260 weeks ago |
| Week 31 | July 26, 1981 | August 1, 1981 | passed 2259 weeks ago |
| Week 32 | August 2, 1981 | August 8, 1981 | passed 2258 weeks ago |
| Week 33 | August 9, 1981 | August 15, 1981 | passed 2257 weeks ago |
| Week 34 | August 16, 1981 | August 22, 1981 | passed 2256 weeks ago |
| Week 35 | August 23, 1981 | August 29, 1981 | passed 2255 weeks ago |
| Week 36 | August 30, 1981 | September 5, 1981 | passed 2254 weeks ago |
| Week 37 | September 6, 1981 | September 12, 1981 | passed 2253 weeks ago |
| Week 38 | September 13, 1981 | September 19, 1981 | passed 2252 weeks ago |
| Week 39 | September 20, 1981 | September 26, 1981 | passed 2251 weeks ago |
| Week 40 | September 27, 1981 | October 3, 1981 | passed 2250 weeks ago |
| Week 41 | October 4, 1981 | October 10, 1981 | passed 2249 weeks ago |
| Week 42 | October 11, 1981 | October 17, 1981 | passed 2248 weeks ago |
| Week 43 | October 18, 1981 | October 24, 1981 | passed 2247 weeks ago |
| Week 44 | October 25, 1981 | October 31, 1981 | passed 2246 weeks ago |
| Week 45 | November 1, 1981 | November 7, 1981 | passed 2245 weeks ago |
| Week 46 | November 8, 1981 | November 14, 1981 | passed 2244 weeks ago |
| Week 47 | November 15, 1981 | November 21, 1981 | passed 2243 weeks ago |
| Week 48 | November 22, 1981 | November 28, 1981 | passed 2242 weeks ago |
| Week 49 | November 29, 1981 | December 5, 1981 | passed 2241 weeks ago |
| Week 50 | December 6, 1981 | December 12, 1981 | passed 2240 weeks ago |
| Week 51 | December 13, 1981 | December 19, 1981 | passed 2239 weeks ago |
| Week 52 | December 20, 1981 | December 26, 1981 | passed 2238 weeks ago |
| Week 53 | December 27, 1981 | January 2, 1982 | passed 2237 weeks ago |