CLDR 32 onwards, B character has been added in date time patterns for Burmese locale(my and my_MM). However, java.text.SimpleDateFormat and in java.time.format.DateTimeFormatter do not support same. To provide full support for 'B' character in the date-time APIs can be put on hold until a strong need arise, but a workaround should be added to handle 'B' character in CLDR data. The LDML specification of 'B' character (day period) suggest that "if translation data is missing for a particular variable dayPeriod in the locale’s language and script, formatting should fall back to using the am/pm values"
 
 http://unicode.org/reports/tr35/tr35-dates.html#dayPeriods
 
 So a workaround could be added while processing CLDR data where 'B' character fall back to 'a' character.