Find the current week number, view the full 2026 week list, and convert dates to weeks instantly. Our page also includes US and ISO week systems, monthly calendars, and a printable week chart.
Current Week Number
Holidays & Observances This Week (US)
- No major holidays or observances this week.
| Week | Sun | Mon | Tue | Wed | Thu | Fri | Sat |
|---|---|---|---|---|---|---|---|
| 14 | 1 | 2 | 3 | 4 | |||
| 15 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 16 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 17 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 18 | 26 | 27 | 28 | 29 | 30 |
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 14 | 1 | 2 | 3 | 4 | 5 | ||
| 15 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 16 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 17 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 18 | 27 | 28 | 29 | 30 |
Date → Week Converter
Week → Date Converter
Week Numbers of 2026
| Week | Start Date (Sunday) | End Date (Saturday) |
|---|---|---|
| Week 1 | December 28, 2025 | January 3, 2026 |
| Week 2 | January 4, 2026 | January 10, 2026 |
| Week 3 | January 11, 2026 | January 17, 2026 |
| Week 4 | January 18, 2026 | January 24, 2026 |
| Week 5 | January 25, 2026 | January 31, 2026 |
| Week 6 | February 1, 2026 | February 7, 2026 |
| Week 7 | February 8, 2026 | February 14, 2026 |
| Week 8 | February 15, 2026 | February 21, 2026 |
| Week 9 | February 22, 2026 | February 28, 2026 |
| Week 10 | March 1, 2026 | March 7, 2026 |
| Week 11 | March 8, 2026 | March 14, 2026 |
| Week 12 | March 15, 2026 | March 21, 2026 |
| Week 13 | March 22, 2026 | March 28, 2026 |
| Week 14 | March 29, 2026 | April 4, 2026 |
| Week 15 | April 5, 2026 | April 11, 2026 |
| Week 16 (Current) | April 12, 2026 | April 18, 2026 |
| Week 17 | April 19, 2026 | April 25, 2026 |
| Week 18 | April 26, 2026 | May 2, 2026 |
| Week 19 | May 3, 2026 | May 9, 2026 |
| Week 20 | May 10, 2026 | May 16, 2026 |
| Week 21 | May 17, 2026 | May 23, 2026 |
| Week 22 | May 24, 2026 | May 30, 2026 |
| Week 23 | May 31, 2026 | June 6, 2026 |
| Week 24 | June 7, 2026 | June 13, 2026 |
| Week 25 | June 14, 2026 | June 20, 2026 |
| Week 26 | June 21, 2026 | June 27, 2026 |
| Week 27 | June 28, 2026 | July 4, 2026 |
| Week 28 | July 5, 2026 | July 11, 2026 |
| Week 29 | July 12, 2026 | July 18, 2026 |
| Week 30 | July 19, 2026 | July 25, 2026 |
| Week 31 | July 26, 2026 | August 1, 2026 |
| Week 32 | August 2, 2026 | August 8, 2026 |
| Week 33 | August 9, 2026 | August 15, 2026 |
| Week 34 | August 16, 2026 | August 22, 2026 |
| Week 35 | August 23, 2026 | August 29, 2026 |
| Week 36 | August 30, 2026 | September 5, 2026 |
| Week 37 | September 6, 2026 | September 12, 2026 |
| Week 38 | September 13, 2026 | September 19, 2026 |
| Week 39 | September 20, 2026 | September 26, 2026 |
| Week 40 | September 27, 2026 | October 3, 2026 |
| Week 41 | October 4, 2026 | October 10, 2026 |
| Week 42 | October 11, 2026 | October 17, 2026 |
| Week 43 | October 18, 2026 | October 24, 2026 |
| Week 44 | October 25, 2026 | October 31, 2026 |
| Week 45 | November 1, 2026 | November 7, 2026 |
| Week 46 | November 8, 2026 | November 14, 2026 |
| Week 47 | November 15, 2026 | November 21, 2026 |
| Week 48 | November 22, 2026 | November 28, 2026 |
| Week 49 | November 29, 2026 | December 5, 2026 |
| Week 50 | December 6, 2026 | December 12, 2026 |
| Week 51 | December 13, 2026 | December 19, 2026 |
| Week 52 | December 20, 2026 | December 26, 2026 |
| Week 53 | December 27, 2026 | January 2, 2027 |
Printable 2026 Week Number Chart and FAQ
US and ISO 8601 week numbering differ in two basic ways: the first day of the week and the rule for naming Week 1. Under ISO 8601, weeks begin on Monday, and Week 1 is the first week with at least four days in the new year, which is the same as the week containing the first Thursday of January.
In the US system, weeks typically begin on Sunday, and Week 1 is simply the week that includes January 1. Because of that, dates around New Year’s can fall into different week numbers under the two systems.
2026 does not literally have 53 full weeks; it has 365 days, which is 52 weeks plus 1 day. The idea of “53 weeks” comes from week numbering systems, not from the year being longer.
Under ISO 8601, a common year that starts on a Thursday is assigned 53 numbered weeks, and 2026 fits that rule. So no extra week is added to the calendar; the week count simply goes up to Week 53 because of how the dates fall.
In one common US calendar convention, weeks start on Sunday, and the week that contains January 1 is treated as Week 1. Under that method, 2027 has 53 labeled weeks in US week numbering, while ISO 8601 counts 52 numbered weeks.
| Date | ISO Week Number | US Week Number |
| Monday, Jan 4, 2027 | Week 1 | Week 2 |
| Monday, Jan 11, 2027 | Week 2 | Week 3 |
| Monday, Jan 18, 2027 | Week 3 | Week 4 |
The “First Thursday” rule determines which week is counted as ISO Week 1. Under ISO 8601, Week 1 is the week that contains the first Thursday of January. Because a week has seven days, this ensures that Week 1 belongs to the year containing the majority of that week’s days.
This is equivalent to the following definitions:
- The first week with at least four days in January.
- The week that contains January 4.
- The week that starts on the Monday closest to January 1.
For 2026, January 1 falls on a Thursday. That means the week from Monday, December 29, 2025, to Sunday, January 4, 2026 contains four days in 2026, so it is classified as ISO Week 1 of 2026. By contrast, when January 1 falls on a Friday, that opening week is assigned to Week 53 of the previous ISO year.
- Sunday Start: United States, Canada, Mexico, much of South America, Japan, South Korea, and the Philippines.
- Monday Start: Almost all of Europe, China, Russia, and most of Africa.
- Saturday Start: Many Middle Eastern and Islamic countries, including Saudi Arabia, the UAE, Iran, and Iraq. In these regions, Friday is the primary day of worship and rest, making Saturday the logical start of the workweek.
Week Number Sources & Updates
Written by Ethan Brooks / Verified by Jacob Thompson
Spotted an error on the Week Number page? Let us know. (We review this Week Number page regularly and update it when corrections or new information are needed.)
March 24, 2026– Initial publish: Added the 2026 week number calendar, full week list, converters, printable chart, and FAQ for US and ISO 8601 week numbering.
Week number tables and date calculation tools on this page are based on information from Wikipedia’s ISO week date page and ISO’s official ISO 8601-1:2019 standard page.