Boeing's[3] release is datelined 'NORTH CHARLESTON, S.C., March 25, 2018': Boeing and Singapore Airlines 'today celebrated the delivery of the first 787-10 airplane'.
Boeing delivered the first 787-10 to launch customer Singapore Airlines at North Charleston on 25 March 2018, with 3,000 people at the ceremony. Singapore Airlines had ordered 49 of the type and became the first group to operate all three Dreamliner variants.
Embraer's announcement of April 4, 2018, reproduced by World Airline News[1]: 'Embraer and Widerøe ... celebrated the delivery of the manufacturer's first production E190-E2 today at a ceremony at Embraer's facility in São José dos Campos.'
On 4 April 2018 Embraer handed Widerøe the first production E190-E2, a 114-seat single-class aircraft, at São José dos Campos; the Norwegian carrier began flying it later that month.