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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
Thursday, 18th September 2025 is part of week 38, which runs from Monday, 15th September 2025 to Sunday, 21st September 2025.