2015-12←  2016-01 looping  →2016-02

20160101_0000 UTC	20160102_0000 UTC	20160103_0000 UTC	20160104_0000 UTC
20160105_0000 UTC	20160106_0000 UTC	20160107_0000 UTC	20160108_0000 UTC
20160109_0000 UTC	20160110_0000 UTC	20160111_0000 UTC	20160112_0000 UTC
20160113_0000 UTC	20160114_0000 UTC	20160115_0000 UTC	20160116_0000 UTC
20160117_0000 UTC	20160118_0000 UTC	20160119_0000 UTC	20160120_0000 UTC
20160121_0000 UTC	20160122_0000 UTC	20160123_0000 UTC	20160124_0000 UTC
20160125_0000 UTC	20160126_0000 UTC	20160127_0000 UTC	20160128_0000 UTC
20160129_0000 UTC	20160130_0000 UTC	20160131_0000 UTC

2015-12←  2016-01 looping  →2016-02