1999-11←  1999-12 looping  →2000-01

19991201_0000 UTC	19991202_0000 UTC
19991203_0000 UTC	19991204_0000 UTC
19991205_0000 UTC	19991206_0000 UTC
19991207_0000 UTC	19991208_0000 UTC
19991209_0000 UTC	19991210_0000 UTC
19991211_0000 UTC	19991212_0000 UTC
19991213_0000 UTC	19991214_0000 UTC
19991215_0000 UTC	19991216_0000 UTC
19991217_0000 UTC	19991218_0000 UTC
19991219_0000 UTC	19991220_0000 UTC
19991221_0000 UTC	19991222_0000 UTC
19991223_0000 UTC	19991224_0000 UTC
19991225_0000 UTC	19991226_0000 UTC
19991227_0000 UTC	19991228_0000 UTC
19991229_0000 UTC	19991230_0000 UTC
19991231_0000 UTC