Julian    - Sunday-based month with weeks
      December 2147483646     
   Sun Mon Tue Wed Thu Fri Sat
48                         335
49 336 337 338 339 340 341 342
50 343 344 345 346 347 348 349
51 350 351 352 353 354 355 356
52 357 358 359 360 361 362 363
53 364 365