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From "Dan Checkoway (JIRA)" <>
Subject [jira] Created: (LANG-598) DateUtils.isSameDay needs to factor in TimeZone
Date Thu, 04 Mar 2010 15:18:27 GMT
DateUtils.isSameDay needs to factor in TimeZone

                 Key: LANG-598
             Project: Commons Lang
          Issue Type: Improvement
          Components: lang.time.*
    Affects Versions: 2.5
            Reporter: Dan Checkoway

DateUtils.isSameDay works great as long as you only care about the default system TimeZone.
 If you're trying to see if two Dates are the same day in *another* TimeZone, then you're

For example, let's say the two dates being compared are:

January 1, 2010 at 8:30pm PST
January 1, 2010 at 9:30pm PST

If your system TimeZone is PST, then sure, those two dates are on the "same day."  But they
are NOT the same day in EST, for example.

The fix would be simple.  Add an isSameDay(Date, Date, TimeZone) method, and simply call setTimezone
on each of the Calendar objects constructed.

The isSameDay(Calendar, Calendar) method can probably be left alone, since the caller conceivably
has called setTimeZone on the Calendar objects prior to calling isSameDay.

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