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The Ultimate Date Calculator is a heavy-duty date calculator for business, government & professional use. Calculate the number of days weeks and years between two dates and store the results. You are given the flexibility of controlling whether the first date and/or the final date should be included in the calculation. Perform Julian date conversions. Calculate the number of days, weeks and years between a series of events and store the results. Dates are automatically sorted into chronological order. You can optionally enter a description for each event, and print a final report.