MySQL: As the world turns

Using only MySQL, how can I select all the time zones where the local current time is between 10:00 am and 2:30 pm?

I have attached a MySQL database dump including the table structure and data.
timezones.sql.txt
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skijAsked:
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MlandaTCommented:
Assuming the timezone tables are already populated
SELECT utc_timezone,  utc_offset, CONVERT_TZ(NOW(), utc_timezone,'-0:00') as CurrentUTCTime
FROM timezones
WHERE CONVERT_TZ(NOW(), utc_timezone,'-0:00') BETWEEN CONCAT(CURDATE(), ' 10:00:00') AND CONCAT(CURDATE(), ' 14:30:00')

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More info:  https://blog.mozilla.org/it/2012/11/16/converting-timezone-specific-times-in-mysql/
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skijAuthor Commented:
Thanks.  The idea is on track, however there are a few problems.  Please test it with the data dump I attached to the original post.   One problem is that NOW() uses the time of the server, not UTC time.  I think that UTC_TIMESTAMP() would work better.
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Julian HansenCommented:
Try this
SELECT 
  timezone,
  utc_offset,
  (
    HOUR(UTC_TIME()) * 3600 + MINUTE(UTC_TIME()) * 60 + SECOND(UTC_TIME())
  ) + (utc_offset * 3600) AS lTime 
FROM
  timezones 
HAVING ltime BETWEEN 36000 
  AND 52200 ;

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Julian HansenCommented:
Much simpler version
SELECT timezone,
  utc_offset,
  UTC_TIME() + INTERVAL +utc_offset HOUR AS localt
  FROM timezones
  HAVING localt BETWEEN '10:00:00' AND '14:30:00';

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skijAuthor Commented:
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