Sun
Units & Measurements abbreviation · Day of the Week
| Stands for | Sunday |
|---|---|
| Categories | Units & Measurements |
Sun stands for Sunday, a day of the week abbreviation.
Named for the sun, from Old English sunnandaeg, a translation of Latin dies Solis. Most Christian traditions observe it as the day of worship, and US calendars traditionally show it as the first day of the week.
Example: Brunch served Sat and Sun from 10 a.m. to 3 p.m.
Usage notes
ISO 8601 makes Sunday day 7, the last day of the week, matching the European calendar convention. Romance languages use names from Latin dies Dominica, "the Lord's day", such as Spanish domingo and French dimanche. Store hours often list Sun separately because of reduced hours or "blue laws" that historically restricted Sunday trading in parts of the US.