Week 3, 2027
January 18–24, 2027
Monday January 18 – Sunday January 242027-W03Days 18–24
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Jan 18 | 2027-W03-1 | 018 | 4 | 10 Sha'ban 1448 AH | Birthday of Martin Luther King, Jr. (United States (federal)) |
| Tue, Jan 19 | 2027-W03-2 | 019 | 4 | 11 Sha'ban 1448 AH | |
| Wed, Jan 20 | 2027-W03-3 | 020 | 4 | 12 Sha'ban 1448 AH | |
| Thu, Jan 21 | 2027-W03-4 | 021 | 4 | 13 Sha'ban 1448 AH | |
| Fri, Jan 22 | 2027-W03-5 | 022 | 4 | 14 Sha'ban 1448 AH | |
| Sat, Jan 23 | 2027-W03-6 | 023 | 4 | 15 Sha'ban 1448 AH | |
| Sun, Jan 24 | 2027-W03-7 | 024 | 5 | 16 Sha'ban 1448 AH |
About week 3
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 4 and Sunday US week 5.
Holidays this week: Birthday of Martin Luther King, Jr. on Mon, Jan 18 in United States (federal). All weeks of 2027 lists the neighbouring weeks.
Week 3 in other years
| Year | Week 3 runs |
|---|---|
| 2025 | Mon, Jan 13 – Sun, Jan 19 |
| 2026 | Mon, Jan 12 – Sun, Jan 18 |
| 2027 | Mon, Jan 18 – Sun, Jan 24 |
| 2028 | Mon, Jan 17 – Sun, Jan 23 |
| 2029 | Mon, Jan 15 – Sun, Jan 21 |
| 2030 | Mon, Jan 14 – Sun, Jan 20 |
In 2028, week 3 runs Mon, Jan 17 – Sun, Jan 23: 364 days later, 1 day earlier in the calendar. Over the 400-year cycle, the Monday of week 3 falls between January 12 and January 18.
By the end of week 3, 24 days of 2027 have passed (6.6% of the year), and 49 ISO weeks of 2027 remain. The week falls in Q1.
Writing week 3
ISO 8601 writes this week as 2027-W03 (basic format 2027W03), from 2027-W03-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.