Score:1

Timezone - Change from EST to EDT or happens automatically?

in flag
Sid

I currently have:

Current default time zone: 'America/New_York'
Local time is now:      Tue Nov 15 07:58:25 EST 2022.

I wonder if this time will automatically change based on EDT? Or vice-versa?

Seems like a major problem for scripts being run on cron.

user535733 avatar
cn flag
EDT change to EST already occurred in the USA on 2022-11-06. On that day, there were many questions on AskUbuntu, but none regarding the time change, nor broken scripts caused by the time change.
Score:2
vn flag

If you didn't mess with systemd-timesyncd, your machine will adjust automatically.

And from cron manpage:

Daylight Saving Time and other time changes

Local time changes of less than three hours, such as those caused by the start or end of Daylight Saving Time, are handled specially. This only applies to jobs that run at a specific time and jobs that are run with a granularity greater than one hour. Jobs that run more frequently are scheduled normally.

If time has moved forward, those jobs that would have run in the interval that has been skipped will be run immediately. Conversely, if time has moved backward, care is taken to avoid running jobs twice.

Time changes of more than 3 hours are considered to be corrections to the clock or timezone, and the new time is used immediately.

So no need to worry, the developers of cron were clever enough to implement this.

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