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nLab > nLab Technical Matters: Server maintenance: switch to UTC

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  1. The nLab and nForum codebases suffer from the design flaw that database timestamps are stored in local time without timezone annotation. From the switch to saunders on 2015-05-16, the server has been running on America/New_York (with ambiguous times during DST transition). We are still investigating local server time before that, but at least in 2015 before the switch to saunders, the server used UTC.

    To work around the evident problems, we will migrate the server and database timestamps (at least from 2015) to UTC. While this is happening, the nLab and nForum will be switched to read-only mode. The migration will start after 22:30 UTC today and last for less than an hour. We will announce the start and end of the migration in this thread.

  2. The migration is starting now.

  3. The migration has finished.

  4. All time values on the nLab and nForum from 2015 onwards should now be in UTC (up to server clock accurary). Some ambiguities had to be resolved during the conversion. This wasn’t possible for some posts/edits in the nForum. In those cases, we have added a prefix that clarifies the ambiguity. Example.

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