1. What is the 90 Days Calculator?

The 90 Days Calculator calculates the date that is exactly 90 days after a given start date. This is useful for various purposes including medication schedules, project deadlines, and legal timelines.

2. How Does the Calculator Work?

The calculator uses the simple date addition formula:

Where:

• Start Date — The initial date from which to calculate
• 90 days — The fixed period to add

Explanation: The calculation accounts for varying month lengths and leap years to provide an accurate future date.

3. Importance of Date Calculation

Details: Accurate date calculation is crucial for planning purposes, compliance with time-sensitive requirements, and scheduling future events.

4. Using the Calculator

Tips: Enter the start date in YYYY-MM-DD format. The calculator will automatically compute the date exactly 90 days later.

5. Frequently Asked Questions (FAQ)

Q1: Does this include the start date in the count?
A: No, the calculation starts from the day after the start date.

Q2: How are leap years handled?
A: The calculation automatically accounts for leap years when adding days.

Q3: What if I need business days instead of calendar days?
A: This calculator uses calendar days. For business days, a different calculator would be needed.

Q4: Can I calculate dates more than 90 days?
A: This calculator is specifically for 90 days. For other periods, use a different date calculator.

Q5: What's the maximum date range this can handle?
A: The calculator can handle any valid date within the range supported by PHP's DateTime class.