Week 3 of 2026 runs January 12, 2026 to January 18, 2026.
Week 3 starts on Monday, January 12, 2026 and ends on Sunday, January 18, 2026. It's the 12th day of the year, sits in Q1, and falls in January. By the end of this week, 18 of 365 days are gone, putting 2026 at 4.9%.
There are no public holidays this week, so all 5 weekdays are working days. Need a different week? Browse the full 2026 week calendar, or jump to this week's number.
Week 3 at a glance
The 7 days of week 3
Every date in week 3 of 2026, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 12 | Weekday | ||
| Tuesday | Day 13 | Weekday | ||
| Wednesday | Day 14 | Weekday | ||
| Thursday | Day 15 | Weekday | ||
| Friday | Day 16 | Weekday | ||
| Saturday | Day 17 | Weekend | ||
| Sunday | Day 18 | Weekend |
What week 3 of 2026 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 3 is one piece of that system.
In 2026, week 3 covers Jan 12 – Jan 18, 2026. That's January, deep in Q1. The same week number shifts by a day or two each year, so week 3 in 2027 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 3 of 2026
No major public holidays in week 3 of 2026 across the US, UK, Canada, or Australia.
Week 3 across years
The same ISO week number lands on different dates each year. Here's how week 3 shifts.
| Year | From (Mon) | To (Sun) | Notable | |
|---|---|---|---|---|
| 2024 | Martin Luther King Jr. Day | view → | ||
| 2025 | view → | |||
| 2026 THIS YEAR | ||||
| 2027 | Martin Luther King Jr. Day | view → | ||
| 2028 | Martin Luther King Jr. Day | view → | ||
| 2029 | Martin Luther King Jr. Day | view → |
Week 3 of 2026: questions and answers
What days are in week 3 of 2026?
Week 3 of 2026 runs from January 12, 2026 (Monday) through January 18, 2026 (Sunday). It spans January.
What month is week 3 in 2026?
Week 3 of 2026 falls entirely in January 2026.
How many working days are in week 3 of 2026?
Week 3 of 2026 has 5 working days.
What quarter is week 3 of 2026 in?
Week 3 of 2026 is in Q1 (2026). The week starts on day 12 of 365.
What is ISO week 3?
ISO week 3 is defined by the ISO 8601 international standard. It begins on Monday, January 12, 2026, and ends on Sunday, January 18, 2026. It is week 6% through the ISO year 2026.