Sets or gets the title format for the title section.
Possible Values:
'd' - the day of the month
'dd' - the day of the month
'ddd' - the abbreviated name of the day of the week
'dddd' - the full name of the day of the week
'h' - the hour, using a 12-hour clock from 1 to 12
'hh' - the hour, using a 12-hour clock from 01 to 12
'H' - the hour, using a 24-hour clock from 0 to 23
'HH' - the hour, using a 24-hour clock from 00 to 23
'm'-the minute, from 0 through 59
'mm' - the minutes,from 00 though59
'M' - the month, from 1 through 12;
'MM' - the month, from 01 through 12
'MMM' - the abbreviated name of the month
'MMMM' - the full name of the month
's' - the second, from 0 through 59
'ss' - the second, from 00 through 59
't' - the first character of the AM/PM designator
'tt' - the AM/PM designator
'y' - the year, from 0 to 99
'yy' - the year, from 00 to 99
'yyy' - the year, with a minimum of three digits
'yyyy' - the year as a four-digit number