tag 10413 notabug thanks On 12/29/2011 11:02 AM, Vicente Pérez M wrote: > How to repeat: > > > date -d '2011-08-21 + 1 DAY' +%Y-%m-%d > date -d '2010-10-10 + 1 DAY' +%Y-%m-%d > > These dates is just when change from normal time UTC-4 to dts UCT-3 > > result: invalid date > > The same operation with --utc works fine. > date -d '2011-08-21 + 1 DAY' +%Y-%m-%d --utc > date -d '2010-10-10 + 1 DAY' +%Y-%m-%d --utc
Thanks for the report. You failed to mention your exact TZ settings, although you hinted at it via 'dts UTC-3', but the behavior you observed is by design and not a bug. In particular time zones, attempts to land in a time that falls during the skipped hour are rejected, and using UTC (which has no daylight savings) is a correct way to avoid the issue. Another way is to pinpoint times to noon rather than the default of midnight (no known time zone has a daylight savings transition at noon), since your particular time zone appears to be among those zones where the daylight savings rules kick in at midnight: date -d '2011-08-21 12:00pm + 1 day' +%Y-%m-%d More on this topic can be found in the FAQ: https://www.gnu.org/software/coreutils/faq/#The-date-command-is-not-working-right_002e -- Eric Blake [email protected] +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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