Nordic myths:
SEVEN DAYS A WEEK
Sun's Day
Moon's Day
Tiu's Day
Woden's Day
Thor's Day
Freya's Day
Saturn's Day
Sun's Day
Old English word:
sunnandæg, meaning
"day of the sun"
The Sun gave people light and warmth every day. They decided to name the first (or last) day of the week after the Sun.
Today "Sun's Day" is known as Sunday, and is the beginning of the week.