1. What Is This Calculator For?

This calculator helps you determine the date that is exactly 90 days after a given start date. This is useful for various planning purposes including project timelines, medication schedules, and legal deadlines.

2. How Does The Calculation Work?

The calculation simply adds 90 days to your selected start date:

The calculation automatically accounts for:

• Different month lengths (28-31 days)
• Leap years
• Calendar year transitions

3. Practical Applications

Details: This calculation is commonly used for medication schedules (90-day prescriptions), probation periods, visa validity periods, and various business contracts that specify 90-day terms.

4. Using The Calculator

Tips: Simply select your start date from the date picker and click "Calculate". The result will show the date exactly 90 days later.

5. Frequently Asked Questions (FAQ)

Q1: Does this include weekends and holidays?
A: Yes, the calculation includes all days (weekdays and weekends). If you need business days only, a different calculation would be needed.

Q2: What if my start date is February 29 (leap day)?
A: The calculation will automatically handle leap years correctly, moving to March 1 in non-leap years.

Q3: Can I calculate other day intervals with this?
A: This calculator is specifically for 90 days. For other intervals, you would need a different calculator.

Q4: How precise is this calculation?
A: The calculation is mathematically precise, adding exactly 90 calendar days to your start date.

Q5: What's the maximum/minimum date I can enter?
A: The calculator will work with any valid date from 1900 to 2100, though your browser's date picker may have different limits.