SUN meaning in Day of Week ?

Answer:

What is Sunday mean?

Sunday is the day of the week between Saturday and Monday. In most Western countries, Sunday is a day of rest and a part of the weekend, whereas in much of the rest of the world, it is considered the first day of the week.

For most observant adherents of Christianity, Sunday is generally observed as a day of worship and rest, recognising it as the Lord's Day and the day of Christ's resurrection; in the United States, Canada, China, Japan, the Philippines as well as in South America, Sunday is the first day of the week. According to the Hebrew calendar and traditional calendars (including Christian calendars) Sunday is the first day of the week; Quaker Christians call Sunday the "first day" in accordance with their testimony of simplicity. The International Organization for Standardization ISO 8601, which is based in Switzerland, calls Sunday the seventh day of the week.

reference

Full Form	Category
Students Understanding Need	Academic & Science
Saturn, Uranus, and Neptune	Academic & Science
Sun Valley (id)	Airport Code
Sunoco, Inc.	Business
Surgical Innov.	Business
Suncorp-Metway Ltd	Business
Stardrifter Unity Network	Community
Schools Uniting Neighborhoods	Community
Skills U Need	Community
Sims United Neighborhoods	Community
Snyder Union And Northumberland	Community
Service User Number	Computing
Setup Uninstaller	Computing
Sunny Bay, Hong Kong	Country Specific
Sun (New)	Cryptocurrency
Sunday	Day of Week
Sun Rasterfile Raster Graphics	File Type
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Scientific Universal Noncommercial	General
Sims United Neighbourhoods	General
Scaling Up Nutrition	General
Surat Utang Negara	General
Special Utility Niva	General
Spiritual United Nations	Governmental
Sign Up Now	Internet
So U Not ....	Messaging
Stanford University Network	Networking
System Underconfigured Now	Networking
Sun Valley, Idaho USA	Regional
Sudanese	Regional
Sunset Railway Company	Regional
Sunset Railway	Regional
Sunderland	Regional