2009-12←  2010-01 looping  →2010-02

20100101_0000 UTC	20100102_0000 UTC	20100103_0000 UTC	20100104_0000 UTC
20100105_0000 UTC	20100106_0000 UTC	20100107_0000 UTC	20100108_0000 UTC
20100109_0000 UTC	20100110_0000 UTC	20100111_0000 UTC	20100112_0000 UTC
20100113_0000 UTC	20100114_0000 UTC	20100115_0000 UTC	20100116_0000 UTC
20100117_0000 UTC	20100118_0000 UTC	20100119_0000 UTC	20100120_0000 UTC
20100121_0000 UTC	20100122_0000 UTC	20100123_0000 UTC	20100124_0000 UTC
20100125_0000 UTC	20100126_0000 UTC	20100127_0000 UTC	20100128_0000 UTC
20100129_0000 UTC	20100130_0000 UTC	20100131_0000 UTC

2009-12←  2010-01 looping  →2010-02