Shoe Construction Terminology. A. Aglet: The plastic sheath at the end of a shoelace which makes the lace easier to thread through the eyelet. holes of a shoe. Ankle Strap: A strap attached at the rear of the shoe that encircles the ankle. Usually features an adjustable.
Earth takes 24 hours to complete a day, but Saturn takes 10 hours and 32 minutes. A year on Earth is, obviously, 1 year, while a year on Saturn lasts 30 years.
The pacing of the film also suggests they don't spend that much time down there (and I know, that's kinda the point), but in order to have 23 years 4 months pass on earth (using the ratio of 1 hour on Miller's planet equaling 7 years on earth) they have to have spent 3.3 hours on Miller's planet.