Q: How should the date of transaction field be completed?
A: For item 23 – Date of Transaction:
Enter the date of the transaction(s) in Item 23. Batch filers will use the format MMDDCCYY format where MM = month, DD = day, CC = century, and YY = year. The format MM/DD/CCYY must be used in Item 23 on the BSA E-Filing discrete FinCEN CTR. Any single digit month or day must be preceded by a zero.
This is addressed in the "FinCEN Currency Transaction Report Electronic Filing Requirements" guide, Attachment C.