The B8601DT format writes
the datetime value by using the ISO 8601 basic datetime notation
yyyymmddT
hhmmss<ffffff>:
is a two-digit month
(zero padded) between 01 and 12.
is a two-digit day
of the month (zero padded) between 01 and 31.
is a two-digit hour
(zero padded) between 00 and 23.
is a two-digit minute
(zero padded) between 00 and 59.
is a two-digit second
(zero padded) between 00 and 59.
are optional fractional
seconds, with a precision of up to six digits, where each digit is
between 0 and 9.