switch (character) {
case 'a': // %a Abbreviated weekday name (Sun..Sat)
builder.appendDayOfWeekShortText();
break;
case 'b': // %b Abbreviated month name (Jan..Dec)
builder.appendMonthOfYearShortText();
break;
case 'c': // %c Month, numeric (0..12)
builder.appendMonthOfYear(1);
break;
case 'd': // %d Day of the month, numeric (00..31)