Understanding >Astronomical calculations
2018.-CALENDAR-. JANUARY FEBRUARY MARCH ------------------------------ ------------------------------ ------------------------------ DAY DAY & NO DAY DAY & NO DAY DAY & NO ------------------- --------- ------------------- --------- ------------------- --------- OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK AT 12H UTC AT 12H UTC AT 12H UTC ------------------- --------- ------------------- --------- ------------------- --------- 245 245 245 1 1 8120 MON. ---- 1 32 8151 THU. 5 ! 1 60 8179 THU. 9 ! 2 2 8121 TUE. 2 33 8152 FRI. 2 61 8180 FRI. 3 3 8122 WED. 3 34 8153 SAM. 3 62 8181 SAM. 4 4 8123 THU. 1 ! 4 35 8154 SUN. ---- 4 63 8182 SUN. ---- 5 5 8124 FRI. 5 36 8155 MON. ---- 5 64 8183 MON. ---- 6 6 8125 SAM. 6 37 8156 TUE. 6 65 8184 TUE. 7 7 8126 SUN. ---- 7 38 8157 WED. 7 66 8185 WED. 8 8 8127 MON. ---- 8 39 8158 THU. 6 ! 8 67 8186 THU. 10 ! 9 9 8128 TUE. 9 40 8159 FRI. 9 68 8187 FRI. 10 10 8129 WED. 10 41 8160 SAM. 10 69 8188 SAM. 11 11 8130 THU. 2 ! 11 42 8161 SUN. ---- 11 70 8189 SUN. ---- 12 12 8131 FRI. 12 43 8162 MON. ---- 12 71 8190 MON. ---- 13 13 8132 SAM. 13 44 8163 TUE. 13 72 8191 TUE. 14 14 8133 SUN. ---- 14 45 8164 WED. 14 73 8192 WED. 15 15 8134 MON. ---- 15 46 8165 THU. 7 ! 15 74 8193 THU. 11 ! 16 16 8135 TUE. 16 47 8166 FRI. 16 75 8194 FRI. 17 17 8136 WED. 17 48 8167 SAM. 17 76 8195 SAM. 18 18 8137 THU. 3 ! 18 49 8168 SUN. ---- 18 77 8196 SUN. ---- 19 19 8138 FRI. 19 50 8169 MON. ---- 19 78 8197 MON. ---- 20 20 8139 SAM. 20 51 8170 TUE. 20 79 8198 TUE. 21 21 8140 SUN. ---- 21 52 8171 WED. 21 80 8199 WED. 22 22 8141 MON. ---- 22 53 8172 THU. 8 ! 22 81 8200 THU. 12 ! 23 23 8142 TUE. 23 54 8173 FRI. 23 82 8201 FRI. 24 24 8143 WED. 24 55 8174 SAM. 24 83 8202 SAM. 25 25 8144 THU. 4 ! 25 56 8175 SUN. ---- 25 84 8203 SUN. ---- 26 26 8145 FRI. 26 57 8176 MON. ---- 26 85 8204 MON. ---- 27 27 8146 SAM. 27 58 8177 TUE. 27 86 8205 TUE. 28 28 8147 SUN. ---- 28 59 8178 WED. 28 87 8206 WED. 29 29 8148 MON. ---- 29 88 8207 THU. 13 ! 30 30 8149 TUE. 30 89 8208 FRI. 31 31 8150 WED. 31 90 8209 SAM. ------------------------------ ------------------------------ ------------------------------ 2018.-CALENDAR-. APRIL MAY JUNE ------------------------------ ------------------------------ ------------------------------ DAY DAY & NO DAY DAY & NO DAY DAY & NO ------------------- --------- ------------------- --------- ------------------- --------- OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK AT 12H UTC AT 12H UTC AT 12H UTC ------------------- --------- ------------------- --------- ------------------- --------- 245 245 245 1 91 8210 SUN. ---- 1 121 8240 TUE. 1 152 8271 FRI. 2 92 8211 MON. ---- 2 122 8241 WED. 2 153 8272 SAM. 3 93 8212 TUE. 3 123 8242 THU. 18 ! 3 154 8273 SUN. ---- 4 94 8213 WED. 4 124 8243 FRI. 4 155 8274 MON. ---- 5 95 8214 THU. 14 ! 5 125 8244 SAM. 5 156 8275 TUE. 6 96 8215 FRI. 6 126 8245 SUN. ---- 6 157 8276 WED. 7 97 8216 SAM. 7 127 8246 MON. ---- 7 158 8277 THU. 23 ! 8 98 8217 SUN. ---- 8 128 8247 TUE. 8 159 8278 FRI. 9 99 8218 MON. ---- 9 129 8248 WED. 9 160 8279 SAM. 10 100 8219 TUE. 10 130 8249 THU. 19 ! 10 161 8280 SUN. ---- 11 101 8220 WED. 11 131 8250 FRI. 11 162 8281 MON. ---- 12 102 8221 THU. 15 ! 12 132 8251 SAM. 12 163 8282 TUE. 13 103 8222 FRI. 13 133 8252 SUN. ---- 13 164 8283 WED. 14 104 8223 SAM. 14 134 8253 MON. ---- 14 165 8284 THU. 24 ! 15 105 8224 SUN. ---- 15 135 8254 TUE. 15 166 8285 FRI. 16 106 8225 MON. ---- 16 136 8255 WED. 16 167 8286 SAM. 17 107 8226 TUE. 17 137 8256 THU. 20 ! 17 168 8287 SUN. ---- 18 108 8227 WED. 18 138 8257 FRI. 18 169 8288 MON. ---- 19 109 8228 THU. 16 ! 19 139 8258 SAM. 19 170 8289 TUE. 20 110 8229 FRI. 20 140 8259 SUN. ---- 20 171 8290 WED. 21 111 8230 SAM. 21 141 8260 MON. ---- 21 172 8291 THU. 25 ! 22 112 8231 SUN. ---- 22 142 8261 TUE. 22 173 8292 FRI. 23 113 8232 MON. ---- 23 143 8262 WED. 23 174 8293 SAM. 24 114 8233 TUE. 24 144 8263 THU. 21 ! 24 175 8294 SUN. ---- 25 115 8234 WED. 25 145 8264 FRI. 25 176 8295 MON. ---- 26 116 8235 THU. 17 ! 26 146 8265 SAM. 26 177 8296 TUE. 27 117 8236 FRI. 27 147 8266 SUN. ---- 27 178 8297 WED. 28 118 8237 SAM. 28 148 8267 MON. ---- 28 179 8298 THU. 26 ! 29 119 8238 SUN. ---- 29 149 8268 TUE. 29 180 8299 FRI. 30 120 8239 MON. ---- 30 150 8269 WED. 30 181 8300 SAM. 31 151 8270 THU. 22 ! ------------------------------ ------------------------------ ------------------------------ 2018.-CALENDAR-. JULY AUGUST SEPTEMBER ------------------------------ ------------------------------ ------------------------------ DAY DAY & NO DAY DAY & NO DAY DAY & NO ------------------- --------- ------------------- --------- ------------------- --------- OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK AT 12H UTC AT 12H UTC AT 12H UTC ------------------- --------- ------------------- --------- ------------------- --------- 245 245 245 1 182 8301 SUN. ---- 1 213 8332 WED. 1 244 8363 SAM. 2 183 8302 MON. ---- 2 214 8333 THU. 31 ! 2 245 8364 SUN. ---- 3 184 8303 TUE. 3 215 8334 FRI. 3 246 8365 MON. ---- 4 185 8304 WED. 4 216 8335 SAM. 4 247 8366 TUE. 5 186 8305 THU. 27 ! 5 217 8336 SUN. ---- 5 248 8367 WED. 6 187 8306 FRI. 6 218 8337 MON. ---- 6 249 8368 THU. 36 ! 7 188 8307 SAM. 7 219 8338 TUE. 7 250 8369 FRI. 8 189 8308 SUN. ---- 8 220 8339 WED. 8 251 8370 SAM. 9 190 8309 MON. ---- 9 221 8340 THU. 32 ! 9 252 8371 SUN. ---- 10 191 8310 TUE. 10 222 8341 FRI. 10 253 8372 MON. ---- 11 192 8311 WED. 11 223 8342 SAM. 11 254 8373 TUE. 12 193 8312 THU. 28 ! 12 224 8343 SUN. ---- 12 255 8374 WED. 13 194 8313 FRI. 13 225 8344 MON. ---- 13 256 8375 THU. 37 ! 14 195 8314 SAM. 14 226 8345 TUE. 14 257 8376 FRI. 15 196 8315 SUN. ---- 15 227 8346 WED. 15 258 8377 SAM. 16 197 8316 MON. ---- 16 228 8347 THU. 33 ! 16 259 8378 SUN. ---- 17 198 8317 TUE. 17 229 8348 FRI. 17 260 8379 MON. ---- 18 199 8318 WED. 18 230 8349 SAM. 18 261 8380 TUE. 19 200 8319 THU. 29 ! 19 231 8350 SUN. ---- 19 262 8381 WED. 20 201 8320 FRI. 20 232 8351 MON. ---- 20 263 8382 THU. 38 ! 21 202 8321 SAM. 21 233 8352 TUE. 21 264 8383 FRI. 22 203 8322 SUN. ---- 22 234 8353 WED. 22 265 8384 SAM. 23 204 8323 MON. ---- 23 235 8354 THU. 34 ! 23 266 8385 SUN. ---- 24 205 8324 TUE. 24 236 8355 FRI. 24 267 8386 MON. ---- 25 206 8325 WED. 25 237 8356 SAM. 25 268 8387 TUE. 26 207 8326 THU. 30 ! 26 238 8357 SUN. ---- 26 269 8388 WED. 27 208 8327 FRI. 27 239 8358 MON. ---- 27 270 8389 THU. 39 ! 28 209 8328 SAM. 28 240 8359 TUE. 28 271 8390 FRI. 29 210 8329 SUN. ---- 29 241 8360 WED. 29 272 8391 SAM. 30 211 8330 MON. ---- 30 242 8361 THU. 35 ! 30 273 8392 SUN. ---- 31 212 8331 TUE. 31 243 8362 FRI. ------------------------------ ------------------------------ ------------------------------ 2018.-CALENDAR-. OCTOBER NOVEMBER DECEMBER ------------------------------ ------------------------------ ------------------------------ DAY DAY & NO DAY DAY & NO DAY DAY & NO ------------------- --------- ------------------- --------- ------------------- --------- OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE OF OF THE JULIAN OF THE MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK MONTH YEAR ELAPSED WEEK AT 12H UTC AT 12H UTC AT 12H UTC ------------------- --------- ------------------- --------- ------------------- --------- 245 245 245 1 274 8393 MON. ---- 1 305 8424 THU. 44 ! 1 335 8454 SAM. 2 275 8394 TUE. 2 306 8425 FRI. 2 336 8455 SUN. ---- 3 276 8395 WED. 3 307 8426 SAM. 3 337 8456 MON. ---- 4 277 8396 THU. 40 ! 4 308 8427 SUN. ---- 4 338 8457 TUE. 5 278 8397 FRI. 5 309 8428 MON. ---- 5 339 8458 WED. 6 279 8398 SAM. 6 310 8429 TUE. 6 340 8459 THU. 49 ! 7 280 8399 SUN. ---- 7 311 8430 WED. 7 341 8460 FRI. 8 281 8400 MON. ---- 8 312 8431 THU. 45 ! 8 342 8461 SAM. 9 282 8401 TUE. 9 313 8432 FRI. 9 343 8462 SUN. ---- 10 283 8402 WED. 10 314 8433 SAM. 10 344 8463 MON. ---- 11 284 8403 THU. 41 ! 11 315 8434 SUN. ---- 11 345 8464 TUE. 12 285 8404 FRI. 12 316 8435 MON. ---- 12 346 8465 WED. 13 286 8405 SAM. 13 317 8436 TUE. 13 347 8466 THU. 50 ! 14 287 8406 SUN. ---- 14 318 8437 WED. 14 348 8467 FRI. 15 288 8407 MON. ---- 15 319 8438 THU. 46 ! 15 349 8468 SAM. 16 289 8408 TUE. 16 320 8439 FRI. 16 350 8469 SUN. ---- 17 290 8409 WED. 17 321 8440 SAM. 17 351 8470 MON. ---- 18 291 8410 THU. 42 ! 18 322 8441 SUN. ---- 18 352 8471 TUE. 19 292 8411 FRI. 19 323 8442 MON. ---- 19 353 8472 WED. 20 293 8412 SAM. 20 324 8443 TUE. 20 354 8473 THU. 51 ! 21 294 8413 SUN. ---- 21 325 8444 WED. 21 355 8474 FRI. 22 295 8414 MON. ---- 22 326 8445 THU. 47 ! 22 356 8475 SAM. 23 296 8415 TUE. 23 327 8446 FRI. 23 357 8476 SUN. ---- 24 297 8416 WED. 24 328 8447 SAM. 24 358 8477 MON. ---- 25 298 8417 THU. 43 ! 25 329 8448 SUN. ---- 25 359 8478 TUE. 26 299 8418 FRI. 26 330 8449 MON. ---- 26 360 8479 WED. 27 300 8419 SAM. 27 331 8450 TUE. 27 361 8480 THU. 52 ! 28 301 8420 SUN. ---- 28 332 8451 WED. 28 362 8481 FRI. 29 302 8421 MON. ---- 29 333 8452 THU. 48 ! 29 363 8482 SAM. 30 303 8422 TUE. 30 334 8453 FRI. 30 364 8483 SUN. ---- 31 304 8423 WED. 31 365 8484 MON. ---- ------------------------------ ------------------------------ ------------------------------
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