Original sentence: Saturday is the last (seventh) day of the week on many calendars and in conventions that consider the week as beginning on Sunday, or the sixth day of the week according to international standard ISO 8601 which was first published in 1988
Edited sentence: Saturday is the last (seventh) day of the week on most calendars and in conventions that consider the week as beginning on Sunday, or the sixth day of the week according to international standard ISO 8601 which was first published in 1988