2000-12←  2001-01 looping  →2001-02

20010101_0000 UTC	20010102_0000 UTC	20010103_0000 UTC	20010104_0000 UTC
20010105_0000 UTC	20010106_0000 UTC	20010107_0000 UTC	20010108_0000 UTC
20010109_0000 UTC	20010110_0000 UTC	20010111_0000 UTC	20010112_0000 UTC
20010113_0000 UTC	20010114_0000 UTC	20010115_0000 UTC	20010116_0000 UTC
20010117_0000 UTC	20010118_0000 UTC	20010119_0000 UTC	20010120_0000 UTC
20010121_0000 UTC	20010122_0000 UTC	20010123_0000 UTC	20010124_0000 UTC
20010125_0000 UTC	20010126_0000 UTC	20010127_0000 UTC	20010128_0000 UTC
20010129_0000 UTC	20010130_0000 UTC	20010131_0000 UTC

2000-12←  2001-01 looping  →2001-02