This is my experience flew with Singapore Airlines from New York to Singapore. This flight takes roughly 19 hours non stop. They assigned this type of Airbus A350-900 ULR and i sat on Premium Economy class. The pilots decided to take the Atlantic route on this flight. You can also see some clips of when the aircraft passing the time zone.
i recorded the video using GoPro Hero 7.
Enjoy the video. You can ask about the flight in the comments below and i will answer. Thank you for watching.