break;
case 'c': // %c Month, numeric (0..12)
builder.appendMonthOfYear(1);
break;
case 'd': // %d Day of the month, numeric (00..31)
builder.appendDayOfMonth(2);
break;
case 'e': // %e Day of the month, numeric (0..31)
builder.appendDayOfMonth(1);
break;
case 'f': // %f Microseconds (000000..999999)