The date 09-21-2008 can be represented by the Roman numerals IX.XXI.MMVIII
mmx11
(Assuming that this is the 2nd June 1991) II.VI.MCMXCI
5'1" is a perfectly good - although out-of-date way of doing it.
二〇一一年 is in a date format (Two, zero, one, one = 2011) if in a numeric format is it: 两千十一 (Two thousand, eleven)
date structures
Alphanumeric refers to a grouping of letters and numbers. Some examples of alphanumeric values might be "123ABC" or "Q87H9." Even writing out an entire date would constitute an alphanumeric entry.
Year-Month-Day
To write the date in Roman numerals, you would convert the numbers in the date to their Roman numeral equivalents. For example, January 1, 2022 would be written as I.I.MMXXII.
07/18/1992
A date
To write a check for 38 hundred, you would write "Thirty-eight hundred and 00/100" in the line where you spell out the amount. On the numeric line, you would write "3,800.00." Make sure to include the date, the payee's name, and your signature to complete the check.
By converting the numerical day, month and year to their Roman numeral equivalents. E.g., 25th June, 2012 would be XXV. VI. MMXII.