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Asked: 2026-05-13T09:44:06+00:00

I have a shell script that I want to get the date and time

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I have a shell script that I want to get the date and time 30 minutes ago in GMT.

I have this working great for full hours, but partial hours don’t seem to work:

1 hour ago

TZ=GMT+1 date +%Y-%m-%d” “%H:%M:%S
2010-01-08 17:43:57

2 hours ago

TZ=GMT+2 date +%Y-%m-%d” “%H:%M:%S
2010-01-08 16:44:07

1/2 hour ago

TZ=GMT+.5 date +%Y-%m-%d” “%H:%M:%S
2010-01-08 18:44:38

tried lots of combinations of 0.5 1.5, no partial hours seem to work, which is weird because there are some timezones that are not full offset of an hour.

any suggestions?

cant use perl or ruby needs to be regular shell or mysql call.

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1 Answer

  1. Editorial Team

    date -u –date=”-30 minutes”

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