Explanation:
Two days ago, I biked my first outdoor imperial century (AKA over 100 miles), but didn’t immediately take a picture of my watch displaying the data as I usually do.
Today, I tried to access it and found out that the watch deletes all data weekly and considers Sunday the first day of the week.
What it has to do with Christianity:
It makes absolutely no sense to consider Sunday the first day of the week rather than Monday. Unless you follow stupid standards established by people who consider the last day of the weekEND holy and thus want to give it pride of place as the starting day rather than the final day of the week.
God rested on the seventh day, which was the Sabbath, so Saturday.
After the resurrection of Jesus, which was on a Sunday, Sunday became an important day for Christianity. This was the reason why the Roman Emperor Constantine made Sunday a resting day. It was still the first day of the week, though.
In the 20th century, it was decided (only for secular/economic reasons) to keep the weekend, Saturday and Sunday, as a unit and call it the end of the week, making Monday the first day of the week.