ISO week 2027-W03

Week 3, 2027

Monday, January 18 – Sunday, January 24, 2027

ISO week 3 of 2027 (2027-W03) runs from Monday, January 18, 2027 to Sunday, January 24, 2027.

This week starts 14 weeks from now. The current week is week 42, 2026.

The 7 days of week 3

Dates in week 3, 2027
Day	Date	Day of year	US week	ISO date
Monday	January 18, 2027	18 of 365	4	2027-W03-1
Tuesday	January 19, 2027	19 of 365	4	2027-W03-2
Wednesday	January 20, 2027	20 of 365	4	2027-W03-3
Thursday	January 21, 2027	21 of 365	4	2027-W03-4
Friday	January 22, 2027	22 of 365	4	2027-W03-5
Saturday	January 23, 2027	23 of 365	4	2027-W03-6
Sunday	January 24, 2027	24 of 365	5	2027-W03-7

Week 3 at a glance

ISO code: 2027-W03 (Monday is 2027-W03-1, Sunday is 2027-W03-7)
Month: January
Quarter: Q1 of 2027
Day of year: Days 18–24 of 365
US week number: Monday–Saturday: US week 4; Sunday: US week 5 (Sunday-start weeks, week 1 contains January 1)
Even or odd: Week 3 is an odd week
Weeks left: After this week, 49 ISO weeks remain in 2027 (52 weeks in total)
Year progress: By Sunday, 7% of 2027 has passed

Holidays and key dates

Monday, January 18: Martin Luther King Jr. Day – US federal holiday

Week numbers follow ISO 8601: weeks start on Monday and week 1 contains the first Thursday of the year. US weeks start on Sunday, with week 1 containing January 1.

Questions about week 3, 2027

What are the dates of week 3 in 2027?

Week 3 of 2027 starts on Monday, January 18, 2027 and ends on Sunday, January 24, 2027.

What month is week 3 of 2027?

Week 3 falls in January. By the Thursday rule that ISO 8601 uses for years and quarters, it counts as a January week.

How do I get week 3 of 2027 in Excel or Google Sheets?

=ISOWEEKNUM(DATE(2027,1,18)) returns 3. To go the other way, =DATE(2027,1,4)-WEEKDAY(DATE(2027,1,4),2)+1+(3-1)*7 returns the Monday, January 18, 2027.