Julian - Monday-based week
     December 2017            January 2018             February 2018            
Mon     338 345 352 359        1   8  15  22  29           36  43  50  57    
Tue     339 346 353 360        2   9  16  23  30           37  44  51  58    
Wed     340 347 354 361        3  10  17  24  31           38  45  52  59    
Thu     341 348 355 362        4  11  18  25           32  39  46  53        
Fri 335 342 349 356 363        5  12  19  26           33  40  47  54        
Sat 336 343 350 357 364        6  13  20  27           34  41  48  55        
Sun 337 344 351 358 365        7  14  21  28           35  42  49  56