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by MikeTLive 3809 days ago

  Numericaly sortable date [YYYY+][mm][dd].[HH][MM][SS],[NNNNNNNNN]
  date -u +%Y%m%d.%H%M%S,%N
  20160122.044145,052215000

  Absolute dates with nanos as seconds since epoch
  date -u +%s.%N
  1453437715.409682000

  Hyphenated,"chunks", with nanos and TZ offset.
  date -uIns
  2016-01-22T04:41:03,121501000+0000