2016-11←  2016-12 looping  →2017-01

20161201_0000 UTC	20161202_0000 UTC	20161203_0000 UTC	20161204_0000 UTC
20161205_0000 UTC	20161206_0000 UTC	20161207_0000 UTC	20161208_0000 UTC
20161209_0000 UTC	20161210_0000 UTC	20161211_0000 UTC	20161212_0000 UTC
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20161225_0000 UTC	20161226_0000 UTC	20161227_0000 UTC	20161228_0000 UTC
20161229_0000 UTC	20161230_0000 UTC	20161231_0000 UTC

2016-11←  2016-12 looping  →2017-01