Week Numbers for the Year 2031
Knowing the week numbers for 2031 can be helpful for planning events, managing projects, or simply staying organized. Here’s a complete breakdown of all the weeks in 2031, including their start and end dates.
What Are Week Numbers?
Week numbers are a standardized way of counting the weeks in a year. Each week is assigned a number from 1 to 52 (sometimes 53), depending on how the calendar aligns with the start of the year. According to the ISO 8601 standard, each week starts on a Monday, and Week 1 is the week that contains the first Thursday of the year.
Week Number Table for 2031
| Week Number | Start Date | End Date |
|---|---|---|
| Week 1 | Dec 30, 2030 | Jan 5, 2031 |
| Week 2 | Jan 6, 2031 | Jan 12, 2031 |
| Week 3 | Jan 13, 2031 | Jan 19, 2031 |
| Week 4 | Jan 20, 2031 | Jan 26, 2031 |
| Week 5 | Jan 27, 2031 | Feb 2, 2031 |
| Week 6 | Feb 3, 2031 | Feb 9, 2031 |
| Week 7 | Feb 10, 2031 | Feb 16, 2031 |
| Week 8 | Feb 17, 2031 | Feb 23, 2031 |
| Week 9 | Feb 24, 2031 | Mar 2, 2031 |
| Week 10 | Mar 3, 2031 | Mar 9, 2031 |
| Week 11 | Mar 10, 2031 | Mar 16, 2031 |
| Week 12 | Mar 17, 2031 | Mar 23, 2031 |
| Week 13 | Mar 24, 2031 | Mar 30, 2031 |
| Week 14 | Mar 31, 2031 | Apr 6, 2031 |
| Week 15 | Apr 7, 2031 | Apr 13, 2031 |
| Week 16 | Apr 14, 2031 | Apr 20, 2031 |
| Week 17 | Apr 21, 2031 | Apr 27, 2031 |
| Week 18 | Apr 28, 2031 | May 4, 2031 |
| Week 19 | May 5, 2031 | May 11, 2031 |
| Week 20 | May 12, 2031 | May 18, 2031 |
| Week 21 | May 19, 2031 | May 25, 2031 |
| Week 22 | May 26, 2031 | Jun 1, 2031 |
| Week 23 | Jun 2, 2031 | Jun 8, 2031 |
| Week 24 | Jun 9, 2031 | Jun 15, 2031 |
| Week 25 | Jun 16, 2031 | Jun 22, 2031 |
| Week 26 | Jun 23, 2031 | Jun 29, 2031 |
| Week 27 | Jun 30, 2031 | Jul 6, 2031 |
| Week 28 | Jul 7, 2031 | Jul 13, 2031 |
| Week 29 | Jul 14, 2031 | Jul 20, 2031 |
| Week 30 | Jul 21, 2031 | Jul 27, 2031 |
| Week 31 | Jul 28, 2031 | Aug 3, 2031 |
| Week 32 | Aug 4, 2031 | Aug 10, 2031 |
| Week 33 | Aug 11, 2031 | Aug 17, 2031 |
| Week 34 | Aug 18, 2031 | Aug 24, 2031 |
| Week 35 | Aug 25, 2031 | Aug 31, 2031 |
| Week 36 | Sep 1, 2031 | Sep 7, 2031 |
| Week 37 | Sep 8, 2031 | Sep 14, 2031 |
| Week 38 | Sep 15, 2031 | Sep 21, 2031 |
| Week 39 | Sep 22, 2031 | Sep 28, 2031 |
| Week 40 | Sep 29, 2031 | Oct 5, 2031 |
| Week 41 | Oct 6, 2031 | Oct 12, 2031 |
| Week 42 | Oct 13, 2031 | Oct 19, 2031 |
| Week 43 | Oct 20, 2031 | Oct 26, 2031 |
| Week 44 | Oct 27, 2031 | Nov 2, 2031 |
| Week 45 | Nov 3, 2031 | Nov 9, 2031 |
| Week 46 | Nov 10, 2031 | Nov 16, 2031 |
| Week 47 | Nov 17, 2031 | Nov 23, 2031 |
| Week 48 | Nov 24, 2031 | Nov 30, 2031 |
| Week 49 | Dec 1, 2031 | Dec 7, 2031 |
| Week 50 | Dec 8, 2031 | Dec 14, 2031 |
| Week 51 | Dec 15, 2031 | Dec 21, 2031 |
| Week 52 | Dec 22, 2031 | Dec 28, 2031 |
| Week 53 | Dec 29, 2031 | Jan 4, 2032 |
Yes, 2031 has 53 weeks! This happens when the year starts on a Thursday or is a leap year that ends on a Thursday—allowing for that extra ISO week.
Why Are Week Numbers Useful?
Week numbers are used in a variety of scenarios across professional and personal settings:
- Software Development: Sprint planning and agile iterations often use weekly cycles.
- Business Operations: Sales goals, reporting cycles, and payroll often reference week numbers.
- Education: Academic calendars may follow weekly structures, particularly in Europe.
- Travel & Hospitality: Hotels, airlines, and tour companies often plan based on week-based pricing and schedules.
Fun Fact
The ISO 8601 week-numbering system was first introduced in 1988 and is used by many countries around the world, especially in Europe. The U.S. doesn't commonly use it, but many global systems rely on it for consistency.
Find the Week Number of Any Date
Want to know the week number of a specific date? In PHP, you can use the DateTime object like this:
Week number is: 14
List the week numbers of the coming years.