OpenHistoricalMap Maintenance – 24 November 2025

Hey OHM community,

The OpenHistoricalMap database will be upgraded to PostgreSQL 17 on Monday - November 24 at 7 p.m. UTC. The site will be in read-only mode for approximately three hours, until the upgrade is complete.

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The migration of OpenHistoricalMap database was successful; it took an hour and a half longer than I expected, but everything was completed successfully.

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