Discrepancy between 2.13.0 and 2.12.7

wendigo commented 2 months ago

The Joda-Time project has been running for many years now, and the codebase is stable. Java SE 8 contains a new date and time library that is the successor to Joda-Time. As such Joda-Time is primarily in maintenance mode and there are few things worthy of being raised as an issue.

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Key information

Joda-Time 2.13.0
Result of TimeZone.getDefault() sun.util.calendar.ZoneInfo[id="Europe/Warsaw",offset=3600000,dstSavings=3600000,useDaylight=true,transitions=165,lastRule=java.util.SimpleTimeZone[id=Europe/Warsaw,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]]
Result of DateTimeZone.getDefault()
Europe/Warsaw

Problem description

In 2.12.7:

LocalDate localDate = ISODateTimeFormat.date().parseLocalDate("1970-01-01");
        long millis = localDate.toDateTimeAtStartOfDay(DateTimeZone.forID("America/Bahia_Banderas")).getMillis();
25200000

In 2.13.0: 28800000 (1 hr difference)

Test case

wendigo commented 2 months ago

 Historical transitions for Mexico have been updated based on
 official Mexican decrees.  The affected timestamps occur during
 the years 1921-1927, 1931, 1945, 1949-1970, and 1981-1997.
 The affected zones are America/Bahia_Banderas, America/Cancun,
 America/Chihuahua, America/Ciudad_Juarez, America/Hermosillo,
 America/Mazatlan, America/Merida, America/Mexico_City,
 America/Monterrey, America/Ojinaga, and America/Tijuana.
 (Thanks to Heitor David Pinto.)

jodastephen commented 2 months ago

https://github.com/JodaOrg/joda-time/commit/4d2a899867c38292230a61117cb439737052e271#diff-3092a110a205f56fa0c1a34125ff3989632a5a7ceb03c282b262d0f281cda81bL2734

JodaOrg / joda-time