Timezone errors in self-hosted Langfuse

Langfuse requires all infrastructure components (ClickHouse and Postgres) to run in the UTC timezone. Non-UTC timezones are not supported and will cause queries to return incorrect or empty results.

If you are seeing missing traces or observations, verify that your ClickHouse instance is running in UTC:

SELECT timezone()

This should return UTC. If it returns a different timezone, update your ClickHouse server configuration to remove any custom timezone setting and restart the server. The same applies to your Postgres timezone setting.

If you would like us to consider supporting other timezones, please vote on this GitHub Discussion.