Date Duration Calculator
Estimate the number of days and weeks between two dates using a simplified calendar model.
Results
What is it?
A simplified date duration calculator that estimates the number of days and weeks between two dates. It uses a flat 365-day year and 30-day month model for quick approximations.
How to use
Enter the start date (year, month, day) and end date (year, month, day). The calculator displays the approximate number of days and complete weeks between the two dates.
Example scenario
You want to estimate the duration from January 1, 2025 to December 31, 2025. Enter start = 2025/1/1, end = 2025/12/31. The approximate result is 360 days (51 weeks).
Pro tip
This uses a simplified calendar model (30-day months, 365-day years) and does NOT account for leap years or varying month lengths. For precise date math, use a dedicated calendar tool or date library.