On Oct 13, 2015 3:49 PM, "Chris Barker" <chris.bar...@noaa.gov> wrote: > [...] > However, numpy datetime is optimized for compact storage and fast computation of absolute deltas (actual hours, minutes, seconds... not calendar units like "the next day" ).
Except that ironically it actually can't compute absolute deltas accurately with one second resolution, because it does the POSIX time thing of pretending that all UTC days have the same number of seconds, even though this is not true (leap seconds). This isn't really relevant to anything else in this thread, except as a reminder of how freaky date/time handling is. -n
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