2016-12←  2017-01 looping  →2017-02

20170101_0000 UTC	20170102_0000 UTC	20170103_0000 UTC	20170104_0000 UTC
20170105_0000 UTC	20170106_0000 UTC	20170107_0000 UTC	20170108_0000 UTC
20170109_0000 UTC	20170110_0000 UTC	20170111_0000 UTC	20170112_0000 UTC
20170113_0000 UTC	20170114_0000 UTC	20170115_0000 UTC	20170116_0000 UTC
20170117_0000 UTC	20170118_0000 UTC	20170119_0000 UTC	20170120_0000 UTC
20170121_0000 UTC	20170122_0000 UTC	20170123_0000 UTC	20170124_0000 UTC
20170125_0000 UTC	20170126_0000 UTC	20170127_0000 UTC	20170128_0000 UTC
20170129_0000 UTC	20170130_0000 UTC	20170131_0000 UTC

2016-12←  2017-01 looping  →2017-02