Why is Sunday considered the first day of the week in some countries?

In countries like the United States, Sunday is traditionally regarded as the first day of the week due to religious and cultural customs dating back to historical calendars.

Which countries consider Monday as the first day of the week?

Many European countries and international standards, such as ISO 8601, designate Monday as the first day of the week, placing Sunday as the last day.

What is the international standard for the first day of the week?

The international standard ISO 8601 specifies Monday as the first day of the week for consistency in business and transport systems.

How do cultural differences affect week start days?

Different cultures have varied historical, religious, and practical reasons for defining the start of the week, influencing whether Sunday or Monday is recognized as day one.

Is Sunday the First or Last Day of the Week? Explained

Discover why Sunday is considered either the first or last day of the week depending on cultural and regional differences worldwide.

0 views

Jul 17, 2026

Sunday can be considered either the first or last day of the week depending on cultural or regional customs. In many countries, including the United States, Sunday is deemed the first day of the week. Conversely, in many European and international standards, Monday is considered the first day, making Sunday the last.

FAQs & Answers

Why is Sunday considered the first day of the week in some countries? In countries like the United States, Sunday is traditionally regarded as the first day of the week due to religious and cultural customs dating back to historical calendars.
Which countries consider Monday as the first day of the week? Many European countries and international standards, such as ISO 8601, designate Monday as the first day of the week, placing Sunday as the last day.
What is the international standard for the first day of the week? The international standard ISO 8601 specifies Monday as the first day of the week for consistency in business and transport systems.
How do cultural differences affect week start days? Different cultures have varied historical, religious, and practical reasons for defining the start of the week, influencing whether Sunday or Monday is recognized as day one.

Watch More

If you found this explanation helpful, explore our related content on how different countries define weekends and workweeks, as well as the history of the seven-day week across cultures.

Is Sunday the First or Last Day of the Week? Explore the cultural differences regarding Sunday as the first or last day of the week in this insightful discussion.
Should Sunday Be the First or Last Day of the Week? Understanding Cultural Perspectives Explore the debate on whether Sunday should be the first or last week, considering cultural perspectives around the world.
Is Sunday the First or Last Day of the Week? Understanding Cultural Differences Explore whether Sunday is the first or last day of the week based on culture and religion. Discover how traditions vary across society.
Is Sunday the First Day or Last Day of the Week? Cultural and Calendar Perspectives Explained Discover whether Sunday is the first or last day of the week based on cultural and calendar systems like the Gregorian calendar and ISO 8601 standard.
Is Sunday the First Day of the Week? Discover if Sunday is considered the first day of the week across cultures and calendars.
Is Sunday the First or Seventh Day of the Week? Explore whether Sunday is the first or seventh day of the week based on culture and calendars.
Which Day Comes First: Sunday or Monday? Explained by Region and ISO Standard Discover whether Sunday or Monday comes first in the week based on cultural context and the ISO 8601 international standard.
Is Sunday or Monday the First Day of the Week? Insights Explained Explore whether Sunday or Monday is considered the first day of the week across cultures.
Is Sunday the First or Second Day of the Week? Understanding Global Perspectives Explore whether Sunday is the first or second day of the week and discover cultural differences around the globe.
Is Sunday or Monday the First Day of the Week? Cultural and Religious Perspectives Explained Discover why Sunday or Monday can be seen as the week's first day based on cultural, religious, and business practices worldwide.
Is Sunday the First Day of the Week? Cultural and Calendar Perspectives Explained Discover why Sunday is the first day of the week in some cultures and why others start with Monday. Learn about calendar standards worldwide.
What Day is the First Day of the Week? Discover which day is considered the first of the week in various cultures and regions.
Is Sunday or Monday the First Day of the Week? A Cultural Comparison Discover whether Sunday or Monday is considered the first day of the week across different cultures and standards.
Is Sunday the First Day of the Week? Discover the Answer! Learn why Sunday is viewed as the first day of the week in some cultures while others believe Monday is the start.