2020-12←  2021-01 looping  →2021-02

20210101_0000 UTC	20210102_0000 UTC	20210103_0000 UTC	20210104_0000 UTC
20210105_0000 UTC	20210106_0000 UTC	20210107_0000 UTC	20210108_0000 UTC
20210109_0000 UTC	20210110_0000 UTC	20210111_0000 UTC	20210112_0000 UTC
20210113_0000 UTC	20210114_0000 UTC	20210115_0000 UTC	20210116_0000 UTC
20210117_0000 UTC	20210118_0000 UTC	20210119_0000 UTC	20210120_0000 UTC
20210121_0000 UTC	20210122_0000 UTC	20210123_0000 UTC	20210124_0000 UTC
20210125_0000 UTC	20210126_0000 UTC	20210127_0000 UTC	20210128_0000 UTC
20210129_0000 UTC	20210130_0000 UTC	20210131_0000 UTC

2020-12←  2021-01 looping  →2021-02