Your days count is missing 24 hours, which include 12 hour daylight and 12 hour night. Your model does not fit with Scriptures since Christ Himself said His full cross (died, buried, rose on the 3rd day) would only fit inside 3 days and 3 nights. You fail to understand that the time and culture was Jewish, not western culture. A Jewish Calendar must be used to fulfill 3 full days + 3 full nights. Tradition has it all wrong because people like you only count the days. Friday to Sunday is incorrect Scripture interpretation, plain and simple.
You realize 20th century... included the 1900s? Don’t you?