1999-12←  2000-01 looping  →2000-02

20000101_0000 UTC	20000102_0000 UTC	20000103_0000 UTC	20000104_0000 UTC
20000105_0000 UTC	20000106_0000 UTC	20000107_0000 UTC	20000108_0000 UTC
20000109_0000 UTC	20000110_0000 UTC	20000111_0000 UTC	20000112_0000 UTC
20000113_0000 UTC	20000114_0000 UTC	20000115_0000 UTC	20000116_0000 UTC
20000117_0000 UTC	20000118_0000 UTC	20000119_0000 UTC	20000120_0000 UTC
20000121_0000 UTC	20000122_0000 UTC	20000123_0000 UTC	20000124_0000 UTC
20000125_0000 UTC	20000126_0000 UTC	20000127_0000 UTC	20000128_0000 UTC
20000129_0000 UTC	20000130_0000 UTC	20000131_0000 UTC

1999-12←  2000-01 looping  →2000-02