Precise Time & Date Calculations for Everyone
Enter any date to see how many days have passed since then
Our days since date calculator provides accurate calculations for determining exactly how many days have passed since any specific date. Whether you're tracking personal milestones, business deadlines, historical events, or important anniversaries, this tool delivers precise time elapsed measurements.
Simply select any date from the past, and our calculator instantly computes the exact number of days that have elapsed. The tool automatically accounts for leap years, varying month lengths, and provides additional conversions to weeks, months, and years for comprehensive time analysis.
DateDistance.com has been providing precise date and time calculations since 2024. Our calculation methods follow international standards including ISO 8601 for date representations and properly account for leap years, timezone differences, and daylight saving time changes.
Our calculations use standard ISO calendar rules and mathematical principles including leap year adjustments and timezone conversions.
All calculations are performed using server-side PHP DateTime library which ensures mathematical precision. Our results have been verified against international time standards and astronomical calculations.
Our calculation algorithms were last reviewed and updated on June 2025 to ensure continued accuracy.
DateDistance is used by project managers, event planners, financial professionals, and individuals worldwide for precise time and date calculations.