We Know the True Seventh Day
"Some reject the seventh-day Sabbath over the belief that we cannot know which day it falls on today, so picking any day should be okay. But this is fallacy. Here are four proofs that identify the true Sabbath.
1: According to Scripture, Christ died on Friday and rose on Sunday, the first day of the week. Practically all churches acknowledge this by observing Easter Sunday and Good Friday.
The women also, which came with him from Galilee, followed after, and beheld the sepulchre, and how his body was laid. And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment” (Luke 23:52–56).
2: The calendar has not been changed so as to confuse the days of the week.
Just as we know that Jesus and His followers observed the same day as Moses, we can be positive that our seventh day is the same day Jesus observed.
Pope Gregory XIII did make a calendar change in 1582, but it did not interfere with the weekly cycle.
What did Gregory do to the calendar? He changed Friday, October 5, 1582, to be Friday, October 15, 1582. He did not affect the weekly cycle of days.
3: The Jews have observed the seventh day from the time of Abraham, and they still keep it today.
An entire nation of people, all around the world, continue to observe a Sabbath they have known for more than 4,000 years.
4: Over 100 languages on earth use the word “Sabbath” for Saturday.
For example, the Spanish word for Saturday is “Sabado,” meaning Sabbath. What does this prove? It proves that when those languages originated long ago, Saturday was recognized as the Sabbath day and was incorporated into the very name of the day."
IAR