Different dates for splits of a transaction

[Lionel Elie Mamane]

Maybe a general/basic bookkeeping question, but I'd appreciate help on
this one.

Suppose I transfer money from my account at bank A to my account at
bank B. It leaves A on 15 May, but arrives at B only 17 May. Gnucash
has a date only for the overall transaction, all splits have the same
date. How should I manage that situation? Putting 15 may is not right
(it won't agree with my statements from B) and putting 17 may is not
right either (it won't agree with my statements from A).


Thanks in advance,

-- 
Lionel