About localized format and symbol settings
The <MarketingOperations_Home>/conf/<locale>/format_symbols.xml file stores values to localize the display of dates, currency, months, and days of the week for each supported locale.
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IBM® discourages editing the format_symbols.xml files.
If you do edit the format_symbols.xml file, follow these guidelines:
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In Windows, you must save the file in UTF-8 format, rather than the Windows default of ANSI.
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If you edit the date/time settings, you must supply the same date format value for both <date-format> and <date-time-format>. Otherwise, you will receive errors while working with Marketing Operations.