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Link to list of timezones at Wikipedia updated

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Alexey 2021-04-24 16:35:05 +00:00
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docs/en/sql-reference/data-types/datetime.md
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@ -23,7 +23,7 @@ The point in time is saved as a [Unix timestamp](https://en.wikipedia.org/wiki/U
Timezone agnostic unix timestamp is stored in tables, and the timezone is used to transform it to text format or back during data import/export or to make calendar calculations on the values (example: `toDate`, `toHour` functions et cetera). The time zone is not stored in the rows of the table (or in resultset), but is stored in the column metadata.
A list of supported time zones can be found in the [IANA Time Zone Database](https://www.iana.org/time-zones). You may also look for time zone names on [Wikipedia](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) query them by `SELECT * FROM system.time_zones`.
A list of supported time zones can be found in the [IANA Time Zone Database](https://www.iana.org/time-zones) and also can be queried by `SELECT * FROM system.time_zones`. [The list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) is also available at Wikipedia.
You can explicitly set a time zone for `DateTime`-type columns when creating a table. Example: `DateTime('UTC')`. If the time zone isn’t set, ClickHouse uses the value of the [timezone](../../operations/server-configuration-parameters/settings.md#server_configuration_parameters-timezone) parameter in the server settings or the operating system settings at the moment of the ClickHouse server start.