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Friday, May 4, 2012

MySQL :: MySQL 5.5 Reference Manual :: 12.7 Date and Time Functions

MySQL :: MySQL 5.5 Reference Manual :: 12.7 Date and Time Functions:

CONVERT_TZ() converts a datetime value dt from the time zone given by from_tz to the time zone given byto_tz and returns the resulting value. Time zones are specified as described in Section 10.6, “MySQL Server Time Zone Support”. This function returns NULL if the arguments are invalid.
If the value falls out of the supported range of the TIMESTAMP type when converted from from_tz to UTC, no conversion occurs. The TIMESTAMP range is described in Section 11.1.2, “Date and Time Type Overview”.
mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','GMT','MET');
        -> '2004-01-01 13:00:00'
mysql> SELECT CONVERT_TZ('2004-01-01 12:00:00','+00:00','+10:00');
        -> '2004-01-01 22:00:00'
To use named time zones such as 'MET' or 'Europe/Moscow', the time zone tables must be properly set up. See Section 10.6, “MySQL Server Time Zone Support”, for instructions.

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