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This online tool enables users to calculate the week number and day of a particular week based on a single date.
Week Number Calculator
Please select a date to ascertain the week number and the corresponding day of the week. The day’s information can be displayed directly by clicking here.
Result
Friday, 12th September 2025 is part of week 37, which runs from Monday, 8th September 2025 to Sunday, 14th September 2025.