Sunday comes from Old English “Sunnandæg," which is derived from a Germanic interpretation of the Latin dies solis, "sun's day." Germanic and Norse mythology personify the sun as a goddess named Sunna or Sól.

Who brought Sunday as a day of worship?

Some people assume the Sabbath was changed to Sunday by Roman Emperor Constantine on March 7, 321 AD. Constantine did indeed change the official Roman day of rest to Sunday, but he was only recognizing something after the fact that had already been going on for almost three centuries.

Why do they call Sunday Sunday?

How Sunday got its name. The name for Sunday stems from the Middle English word sunnenday, which itself comes from the Old English word sunnandæg. The English derivations stem from the Latin diēs sōlis (“sun's day”). To know why this particular day is devoted to the sun, you have to look to Babylonian times.