Extract ID to DOB & Age for year 2000 and above

Hi All,

The country where I am from has the ID which is the first 6 digits determined our year, month, day. eg, 050101 (2005-Jan-01). I have no issue for those who were born below 2000 but above the formula doesn't work.

How to make both DOB & Age works regardless of what year they were born?

Please find attachment.

Thank-You very much