Check the following:
- Fractional timezones are displayed in the correct columns.
- Left & right navigation across fractional hours shifts the timelines correctly.
- Left & right navigation round-trip equals the starting point.
- Double-midnight for Cuba midnight DST end
- Crossing date boundaries

-- Start time (2017-11-05T00:29:02Z = 1509841742) --

  What time is it?

  🕛 (UTC) UTC                                                             00:29, 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
  🕐 (CET) Europe/Paris                                                    01:29, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕑 (IST) Israel                                                          02:29, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕔 (IST) Asia/Calcutta                                                   05:59, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕘 (+0845) Australia/Eucla                                               09:14, Sun Nov 05, 2017
   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8  
                                                              📆 Mon 06
  🕙 (AEDT) Australia/Sydney                                               11:29, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕑 (+14) Pacific/Kiritimati                                              14:29, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕑 (HST) Pacific/Honolulu                                                14:29, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕖 (CDT) US/Central                                                      19:29, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕗 (CDT) Cuba                                                            20:29, Sat Nov 04, 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
  🕘 (-03) America/Argentina/ComodRivadavia                                21:29, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
-- Plus 1 hour (2017-11-05T01:29:02Z = 1509845342) --

  What time is it?

  🕐 (UTC) UTC                                                             01:29, 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
  🕑 (CET) Europe/Paris                                                    02:29, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕒 (IST) Israel                                                          03:29, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕕 (IST) Asia/Calcutta                                                   06:59, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕙 (+0845) Australia/Eucla                                               10:14, Sun Nov 05, 2017
   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8  
                                                              📆 Mon 06
  🕛 (AEDT) Australia/Sydney                                               12:29, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕒 (+14) Pacific/Kiritimati                                              15:29, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕒 (HST) Pacific/Honolulu                                                15:29, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕗 (CDT) US/Central                                                      20:29, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕘 (CDT) Cuba                                                            21:29, Sat Nov 04, 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
  🕙 (-03) America/Argentina/ComodRivadavia                                22:29, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
-- Minus 15 minutes (2017-11-05T01:14:02Z = 1509844442) --

  What time is it?

  🕐 (UTC) UTC                                                             01:14, 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
  🕑 (CET) Europe/Paris                                                    02:14, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕒 (IST) Israel                                                          03:14, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕕 (IST) Asia/Calcutta                                                   06:44, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕘 (+0845) Australia/Eucla                                               09:59, Sun Nov 05, 2017
   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7  
                                                                  📆 Mon 06
  🕛 (AEDT) Australia/Sydney                                               12:14, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕒 (+14) Pacific/Kiritimati                                              15:14, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕒 (HST) Pacific/Honolulu                                                15:14, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕗 (CDT) US/Central                                                      20:14, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕘 (CDT) Cuba                                                            21:14, Sat Nov 04, 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
  🕙 (-03) America/Argentina/ComodRivadavia                                22:14, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
-- Return to start (2017-11-05T00:29:02Z = 1509841742) --

  What time is it?

  🕛 (UTC) UTC                                                             00:29, 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
  🕐 (CET) Europe/Paris                                                    01:29, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕑 (IST) Israel                                                          02:29, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕔 (IST) Asia/Calcutta                                                   05:59, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕘 (+0845) Australia/Eucla                                               09:14, Sun Nov 05, 2017
   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8  
                                                              📆 Mon 06
  🕙 (AEDT) Australia/Sydney                                               11:29, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕑 (+14) Pacific/Kiritimati                                              14:29, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕑 (HST) Pacific/Honolulu                                                14:29, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕖 (CDT) US/Central                                                      19:29, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕗 (CDT) Cuba                                                            20:29, Sat Nov 04, 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
  🕘 (-03) America/Argentina/ComodRivadavia                                21:29, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
-- Minus 1 hour, date changed (2017-11-04T23:29:02Z = 1509838142) --

  What time is it?

  🕙 (UTC) UTC                                                             23:29, Sat Nov 04, 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  
  📆 Sat 04
  🕛 (CET) Europe/Paris                                                    00:29, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Sun 05
  🕐 (IST) Israel                                                          01:29, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Sun 05
  🕓 (IST) Asia/Calcutta                                                   04:59, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Sun 05
  🕗 (+0845) Australia/Eucla                                               08:14, Sun Nov 05, 2017
   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8  
                                                              📆 Sun 05
  🕙 (AEDT) Australia/Sydney                                               10:29, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Sun 05
  🕐 (+14) Pacific/Kiritimati                                              13:29, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕐 (HST) Pacific/Honolulu                                                13:29, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sat 04
  🕕 (CDT) US/Central                                                      18:29, Sat Nov 04, 2017
  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  
                      📆 Sat 04
  🕖 (CDT) Cuba                                                            19:29, Sat Nov 04, 2017
  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  
                  📆 Sat 04
  🕗 (-03) America/Argentina/ComodRivadavia                                20:29, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sat 04
-- Return to start (2017-11-05T00:29:02Z = 1509841742) --

  What time is it?

  🕛 (UTC) UTC                                                             00:29, 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
  🕐 (CET) Europe/Paris                                                    01:29, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕑 (IST) Israel                                                          02:29, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕔 (IST) Asia/Calcutta                                                   05:59, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕘 (+0845) Australia/Eucla                                               09:14, Sun Nov 05, 2017
   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8  
                                                              📆 Mon 06
  🕙 (AEDT) Australia/Sydney                                               11:29, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕑 (+14) Pacific/Kiritimati                                              14:29, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕑 (HST) Pacific/Honolulu                                                14:29, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕖 (CDT) US/Central                                                      19:29, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕗 (CDT) Cuba                                                            20:29, Sat Nov 04, 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
  🕘 (-03) America/Argentina/ComodRivadavia                                21:29, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
-- Zero minutes (2017-11-05T00:00:00Z = 1509840000) --

  What time is it?

  🕛 (UTC) UTC                                                             00:00, 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
  🕐 (CET) Europe/Paris                                                    01:00, Sun Nov 05, 2017
   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0  
                                                                                              📆 Mon 06
  🕑 (IST) Israel                                                          02:00, Sun Nov 05, 2017
   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1  
                                                                                          📆 Mon 06
  🕔 (IST) Asia/Calcutta                                                   05:30, Sun Nov 05, 2017
   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4  
                                                                              📆 Mon 06
  🕗 (+0845) Australia/Eucla                                               08:45, Sun Nov 05, 2017
   8   9  10  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7  
                                                                  📆 Mon 06
  🕙 (AEDT) Australia/Sydney                                               11:00, Sun Nov 05, 2017
  11  12  13  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  
                                                      📆 Mon 06
  🕑 (+14) Pacific/Kiritimati                                              14:00, Sun Nov 05, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Mon 06
  🕑 (HST) Pacific/Honolulu                                                14:00, Sat Nov 04, 2017
  14  15  16  17  18  19  20  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  
                                          📆 Sun 05
  🕖 (CDT) US/Central                                                      19:00, Sat Nov 04, 2017
  19  20  21  22  23   0   1   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  
                      📆 Sun 05≠DST
  🕗 (CDT) Cuba                                                            20:00, Sat Nov 04, 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
  🕘 (-03) America/Argentina/ComodRivadavia                                21:00, Sat Nov 04, 2017
  21  22  23   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15  16  17  18  19  20  
              📆 Sun 05
