Hello, We received a notification from a customer that the Ireland Time Zones sprung forward too early. According to what I found the following is true: Last Sunday of March 01:00 GMT - Last Sunday of October 01:00 GMT = GMT+1 Last Sunday of October 01:00 GMT - Last Sunday of March 01:00 GMT = GMT+0 As of the time this issue was reported the Eire (GMT+1) and Europe/Dublin (GMT+1) time zones need to be GMT+0, however, they are GMT+1. Are there any standard troubleshooting tips I can pass along to our developers? I’m looking through the documentation I can find and the threads and have seen a couple regarding Irelands time zones, but nothing conclusive on how to solve our issue moving forward. I’d like to understand if this is an error, or if there is a configuration we need to make on our end to ensure the time zones are correct in our system. [cid:image001.jpg@01DB927E.D1C45080] [Meazure Learning]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.meazurelearning.com%...> meazurelearning.com [Facebook]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.facebook.com%2FMeazu...> [X]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fx.com%2Fmeazurelearning&...> [LinkedIn]<https://us.content.exclaimer.net/?url=https%3A%2F%2Fwww.linkedin.com%2Fcompa...> Christopher Brown Product Manager [cid:image006.png@01DB927E.D1C45080] cbrown@meazurelearning.com<mailto:cbrown@meazurelearning.com> [cid:image007.png@01DB927E.D1C45080] 205-807-0349<tel:205-807-0349> [cid:image008.png@01DB927E.D1C45080] 205-807-0349<tel:205-807-0349> [cid:image009.png@01DB927E.D1C45080] Alabama, US (35244) [cid:image010.png@01DB927E.D1C45080]
On 2025-03-11 10:14, Chris Brown via tz wrote:
the Eire (GMT+1) and Europe/Dublin (GMT+1) time zones need to be GMT+0, however, they are GMT+1.
Are there any standard troubleshooting tips I can pass along to our developers?
They can try running this shell command: $ TZ=Europe/Dublin date Tue Mar 11 17:41:17 GMT 2025 The second line is the output I get on my system (Ubuntu 24.10), and it's GMT which is correct. If they want something fancier they can run this to show this year's transitions: $ zdump -V -c 2025,2026 Europe/Dublin Europe/Dublin Sun Mar 30 00:59:59 2025 UT = Sun Mar 30 00:59:59 2025 GMT isdst=0 gmtoff=0 Europe/Dublin Sun Mar 30 01:00:00 2025 UT = Sun Mar 30 02:00:00 2025 IST isdst=1 gmtoff=3600 Europe/Dublin Sun Oct 26 00:59:59 2025 UT = Sun Oct 26 01:59:59 2025 IST isdst=1 gmtoff=3600 Europe/Dublin Sun Oct 26 01:00:00 2025 UT = Sun Oct 26 01:00:00 2025 GMT isdst=0 gmtoff=0 If these shell commands work but the software in question doesn't, the problem lies somewhere outside the TZDB installation and the C library.
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Chris Brown -
Paul Eggert