Interactive MySQL WEEK() demo
Select a date and compare MySQL WEEK() modes, including different week starts and week-number ranges.
| Mode | First day | Range | Week 1 is the first week… |
|---|---|---|---|
| Server setting | Depends on setting | Uses default_week_format for WEEK() | |
| Sunday | 0–53 | with a Sunday in this year | |
| Monday | 0–53 | with 4 or more days this year | |
| Sunday | 1–53 | with a Sunday in this year | |
| Monday | 1–53 | with 4 or more days this year | |
| Sunday | 0–53 | with 4 or more days this year | |
| Monday | 0–53 | with a Monday in this year | |
| Sunday | 1–53 | with 4 or more days this year | |
| Monday | 1–53 | with a Monday in this year |
Subhendu Mohapatra
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