DateMath

DateMath is your ultimate date calculation companion designed for simplicity and precision. Calculate days between dates instantly with options to include or exclude end dates, showing total days and detailed year/month/day breakdowns. Predict future or past dates by adding or subtracting days, weeks, or months - perfect for planning important events like due dates, anniversaries, exams, and deadlines. The age calculator determines both actual and nominal age from any birthday, automatically identifies Western zodiac signs and Chinese zodiac animals, and displays the exact number of days you've lived. All calculations are saved to a searchable history for easy reference. Customize your experience with light or dark themes and choose whether weeks start on Monday or Sunday. Built with beautiful Material Design 3 interface featuring edge-to-edge display support and vibrant gradient accents. All data stays securely on your device using local storage - no permissions required, no internet access needed, complete privacy guaranteed. Ideal for students, professionals, planners, and anyone who works with dates regularly.