Leap Year Checker
Check if a year is a leap year and find nearby leap years
About This Tool
This tool calculates the ISO week number for any given date, helping users determine which specific week of the year a particular day falls into. Ideal for project management, scheduling, and academic planning.
Simply input your date in YYYY-MM-DD format to get the corresponding ISO week number as output. The system automatically adjusts for leap years and adheres to ISO 8601 standards.
Use cases include tracking deadlines, organizing events, or analyzing time-series data without needing external software or subscriptions. All calculations are performed locally within your browser; no personal information is transmitted.