A standing order is first executed on the date you've set as the start date. The following payments will be executed at set periods. It will be performed until the set period end date. If you haven't set up an end date, it will be performed until you manually delete it.
If you transfer money by IBAN, it will reach the recipient on the next business day according to TARGET 2 calendarhttps://www.ecb.europa.eu/paym/target/target2/profuse/calendar/html/index.en.html.