On Fri, 29 May 2020 22:58:55 -0700, Ed Jaffe wrote: >On 5/29/2020 7:00 PM, Peter Vels wrote: >> How does one get the TIME a z/OS data set was created? The date is easy, >> but I'm after the time. > >Data set creation time has been supported by z/OS for many years. To get >it, you must allocate using FMT8/9 DSCBs in the VTOC instead of FMT1. >When you do so, you get this field in the format 9 disk label: > >DS9TIME DS XL6 Number of microseconds since >* midnight, local time, that the data >* set described by its format 8 DSCB >* was created. See creation date >* field, DS1CREDT, for the date @V2A > I'll pose directly the question I posed earlier only obliquely: On the Fall Daylight Saving Time boundary, does "microseconds since midnight, local time" extend to 9.00e10 because the day has 25 hours, whereas it extends to only 8.64e10 in a 24-hour day?
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