When is week 18?
Week 18 of 2027: May 3 – May 9
Mon, May 3 – Sun, May 9, 2027
Week 18 of 2026 ended on Sunday, May 3, 2026, so this is next year's. It starts in 215 days.
Week 18 of 2027 day by day
Week 18 of 2027 falls in May, in Q2. Its Monday is day 123 of 2027. In US-style numbering (weeks starting on Sunday, week 1 containing January 1, like WEEKNUM in Excel) that Monday is in week 19.
| Day | Date | Holidays and observances |
|---|---|---|
| Monday | May 3, 2027 | — |
| Tuesday | May 4, 2027 | — |
| Wednesday | May 5, 2027 | Cinco de Mayo |
| Thursday | May 6, 2027 | — |
| Friday | May 7, 2027 | — |
| Saturday | May 8, 2027 | — |
| Sunday | May 9, 2027 | Mother's Day |
Week 18 by year
More week numbers
Frequently asked questions
When is week 18 of 2027?
From Monday, May 3, 2027 to Sunday, May 9, 2027.
How many days until week 18?
215 days, counting from today to Monday, the first day of the week.
Why can week 1 start in December?
ISO week 1 is the week containing the year's first Thursday, so it can begin as early as December 29 of the previous year.