Week 5, 2027
February 1–7, 2027
Monday February 1 – Sunday February 72027-W05Days 32–38
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Feb 1 | 2027-W05-1 | 032 | 6 | 24 Sha'ban 1448 AH | St Brigid's Day (Ireland) |
| Tue, Feb 2 | 2027-W05-2 | 033 | 6 | 25 Sha'ban 1448 AH | |
| Wed, Feb 3 | 2027-W05-3 | 034 | 6 | 26 Sha'ban 1448 AH | |
| Thu, Feb 4 | 2027-W05-4 | 035 | 6 | 27 Sha'ban 1448 AH | |
| Fri, Feb 5 | 2027-W05-5 | 036 | 6 | 28 Sha'ban 1448 AH | |
| Sat, Feb 6 | 2027-W05-6 | 037 | 6 | 29 Sha'ban 1448 AH | Chinese New Year (Day 1) (Singapore); Lunar New Year's Day (Hong Kong); Chinese New Year (Fire Goat) |
| Sun, Feb 7 | 2027-W05-7 | 038 | 7 | 30 Sha'ban 1448 AH |
About week 5
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 6 and Sunday US week 7.
Holidays this week: St Brigid's Day on Mon, Feb 1 in Ireland; Chinese New Year (Day 1) on Sat, Feb 6 in Singapore; Lunar New Year's Day on Sat, Feb 6 in Hong Kong. Also this week: Chinese New Year (Fire Goat) on Sat, Feb 6 (first day of the first lunar month). All weeks of 2027 lists the neighbouring weeks.
Week 5 in other years
| Year | Week 5 runs |
|---|---|
| 2025 | Mon, Jan 27 – Sun, Feb 2 |
| 2026 | Mon, Jan 26 – Sun, Feb 1 |
| 2027 | Mon, Feb 1 – Sun, Feb 7 |
| 2028 | Mon, Jan 31 – Sun, Feb 6 |
| 2029 | Mon, Jan 29 – Sun, Feb 4 |
| 2030 | Mon, Jan 28 – Sun, Feb 3 |
In 2028, week 5 runs Mon, Jan 31 – Sun, Feb 6: 364 days later, 1 day earlier in the calendar. Over the 400-year cycle, the Monday of week 5 falls between January 26 and February 1.
By the end of week 5, 38 days of 2027 have passed (10.4% of the year), and 47 ISO weeks of 2027 remain. The week falls in Q1.
Writing week 5
ISO 8601 writes this week as 2027-W05 (basic format 2027W05), from 2027-W05-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.