RollingCalendarTest fails for me, and I think it's this same issue - the tests assume a particular locale. The cause is the choice of dates for testing whether a "ww" SimpleDateFormat collides.
jshell> new java.text.SimpleDateFormat("ww", Locale.UK).format(new Date(31622400000L));
$4 ==> "53"
jshell> new java.text.SimpleDateFormat("ww", Locale.US).format(new Date(31622400000L));
$5 ==> "01"