Week 20 in 2025
Week 20 of 2025 begins on May 12, 2025 and ends on May 18, 2025. It covers days 132 to 138 of the year and falls in quarter 2.
Weeks since this week: 74
Week 20 of 2025 at a glance
| Starts (Monday) | May 12, 2025 |
|---|---|
| Ends (Sunday) | May 18, 2025 |
| US week (Sunday to Saturday) | 20 (May 11, 2025) |
| Month | May |
| Quarter | Q2 |
| Days of the year | 132–138 |
| Year completed at the end of this week | 37.8% |
| Weeks left in 2025 after this week | 32 |
| Weeks in 2025 | 52 |
| Even or odd week | Even |
Calendar for May 2025
Download Calendar in printable A4 PDF
(US version) (EU/ISO Version)
All Weeks in 2025:
Past & Future Week Number 20:
US and ISO week numbers
In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 20 of 2025. It runs from May 11, 2025 to May 17, 2025.
Even and odd weeks
Week 20 is an even week. Even and odd week numbers are used for alternating schedules such as shift rotas, school timetables, custody arrangements and waste collection.
Week 20 in other years
| From | To | |
|---|---|---|
| Week 20 in 2023 | May 15, 2023 | May 21, 2023 |
| Week 20 in 2024 | May 13, 2024 | May 19, 2024 |
| Week 20 in 2026 | May 11, 2026 | May 17, 2026 |
| Week 20 in 2027 | May 17, 2027 | May 23, 2027 |
How week numbers are counted
Most of the world numbers weeks according to the ISO 8601 standard. A week starts on Monday, and week 1 is the week that contains the first Thursday of the year, which is always the week that contains 4 January.
Week 1 of 2025 began on December 30, 2024. 2025 has 52 ISO weeks.
Because of this rule, the first days of January can belong to the last week of the previous year, and the last days of December can belong to week 1 of the next year.
In the United States, weeks usually start on Sunday and week 1 is the week that contains 1 January, so the US week number can differ from the ISO week number.
Find the week number of a date
Frequently Asked Questions (FAQ)
When does week 20 of 2025 start and end?
Week 20 of 2025 starts on May 12, 2025 and ends on May 18, 2025 (ISO 8601, Monday to Sunday).
Which month is week 20 of 2025 in?
Week 20 of 2025 is in May.
What dates are in week 20 of 2025?
May 12, 2025, May 13, 2025, May 14, 2025, May 15, 2025, May 16, 2025, May 17, 2025, and May 18, 2025
How many weeks does 2025 have?
2025 has 52 ISO weeks.
Is week 20 an even or odd week?
Week 20 is an even week.
What is the US week number for this week?
In the US system, where weeks start on Sunday and week 1 is the week that contains 1 January, this is week 20 of 2025. It runs from May 11, 2025 to May 17, 2025.