sunnandæg
sunnandæg
Old English
“The English week begins with a pagan sun god. Half of Europe renamed the day after Jesus. English never bothered.”
The Romans called it dies Solis, the day of the Sun, placing it first in their planetary week. The system dates to at least the 1st century CE, when Varro and Cassius Dio recorded the seven-day planetary cycle. Sol, the unconquered sun god, got the opening slot. The Greeks followed the same pattern with hemera Heliou.
When Germanic tribes adopted the Roman seven-day week around the 4th century CE, they translated literally. Old English sunnandæg was a calque of dies Solis. Old High German had sunnuntag. Old Norse had sunnudagr. No interpretation, no adaptation, just a straight swap of sun for Sol. The word was already transparent: sun's day.
Christianity changed the picture in the Romance-speaking world. Emperor Constantine declared Sunday a day of rest in 321 CE, and the Church began calling it dies Dominicus, the Lord's Day. Spanish domingo, French dimanche, Italian domenica, and Portuguese domingo all descend from that Christian rebranding. The sun was written out of the name.
English kept the sun. So did German (Sonntag), Dutch (zondag), and the Scandinavian languages. This split runs straight through Europe: Romance languages honor the Christian sabbath, Germanic languages honor the Roman star. The word 'Sunday' is a fossil of a moment when northern Europe accepted Rome's calendar but not yet Rome's church.
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Today
Sunday is either the first day of the week or the last, depending on which standard you follow. The ISO 8601 standard (used in most of Europe and international business) places it at the end; American calendars put it first. This confusion is ancient. The Romans started the week with Saturn (Saturday), then shifted to Sol.
Every Sunday, English speakers unknowingly name a Roman star god while Spanish speakers name the Christian Lord. Neither group thinks about it. The word is a relic of a 4th-century religious boundary that still cuts across the map of Europe, hiding in plain sight on every calendar.
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