How Many Days in a Week
Quick answer: 7 days — with origins and time facts
⚡Quick Answer
1 week = 7 days = 168 hours = 10,080 minutes. The 7-day week comes from ancient Babylon and is based on celestial bodies.
Step-by-Step Guide
The Quick Answer
7 days in a week: Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday.
Time Conversions
1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds
Why 7 Days?
Ancient Babylonians created the 7-day week based on 7 celestial bodies visible to the naked eye: Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn.
Day Name Origins
Sunday (Sun) | Monday (Moon) | Tuesday (Tiw/Mars) | Wednesday (Woden/Mercury) | Thursday (Thor/Jupiter) | Friday (Frigg/Venus) | Saturday (Saturn)
Frequently Asked Questions
Why isn't a week 5 or 10 days?
The 7-day week has been used for over 4,000 years. It matches roughly one lunar phase (7 days) and was adopted by major religions. Attempts to change it (like France's 10-day week in 1793) failed.
What day does the week start on?
It varies! Sunday (US, Canada, Japan), Monday (most of Europe, ISO standard), Saturday (Middle East).
How many weeks in a year?
52 complete weeks + 1 day (or 2 in leap years). More precisely: 52.14 weeks.