@intertax , as I read the referred document from the IRS, it is not surprising because this is the general practice even in domestic wire transfers. Your local bank ( transferror ) would be aware the settlement cannot occur after certain time of day ( domestic is 2:00PM Pacific or 5PM ET). Banks will typically not wire transfer unless they can meet the deadline. Bottom line is you do not have to worry -- your bank will send out wire transfer in time to be affected ( even if it the next day local time).
Hope this helps.
