timezone mess
Post on 27-Aug-2014
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Timezone Mess
Misha Kozik
@mishadoff
UTC+03:00
1
in Java/GWT
2
• List of all timezones
• User timezone option
• Show report in selected TZ
• Client/Server conversions
• TZ identifier (EET, PST)
Project Level Timezone
3
• TZ Olson Database
• 600+ elements? • User-friendly selector
#1 Timezone List
4
• Java TimeZone
• GWT TimeZone
• Custom serialization
• Database
#2 Server vs Client
5
• Offset UTC-05:00
• Timezone America/New_York
• Daylight Saving Time
• Historical Data
• Measured in minutes
#3 Timezone != Offset
6
• TimeZone.getDefault()
• GWT TimeZone (limited)
• jstz (limited)
• Browsers, Arghhh!
• NO WAY!
#4 Detect User Timezone
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• GWT Debug
• Date date = new Date();
• -Duser.timezone=Europe/Kiev
• System time
#5 Debug
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• EST, EET, PST
• Timezone.get(“XXX”)
• Duplicates (CST, AST)
• Deprecated
#6 Label
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