Length of *DT, *DTM variables in ADaM datasets

Hi Community.

We're doing the CRT review of variables and we encounter different approaches in setting length for *DT, *DTM variables in ADaM datasets. 

Should the length be set to max for *DTM variables? For example: datetime with datetime20. format is stored as "20JUN2022:09:37:00" but when the format is removed, it's stored as "1971337020". DataType is integer. Should the length be set to 8 or 10?

Thank you in advance.