-- Start DST missing midnight (2017-03-12T05:00:00Z = 1489294800) --

  What time is it?

  🕔 (UTC) UTC                                                             05:00, Sun Mar 12, 2017
   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  
  📆 Sun 12
  🕐 (CDT) Cuba                                                            01:00, Sun Mar 12, 2017
  19  20  21  22  23   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  
                      📆 Sun 12=DST
-- End DST double midnight (2017-11-05T04:00:00Z = 1509854400) --

  What time is it?

  🕓 (UTC) UTC                                                             04:00, Sun Nov 05, 2017
   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  
  📆 Sun 05
  🕛 (CDT) Cuba                                                            00:00, Sun Nov 05, 2017
  20  21  22  23   0   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  
                  📆 Sun 05≠DST
