Date Calculator 📅

Add or subtract days, weeks, months from a date. Great for planning events and deadlines.

+30d 📅

Date Calculator 📅

Add or subtract days, weeks, months from a date. Great for planning events and deadlines.

Date Calculator

📅
Days
📆
Weeks
📊
Months
📈
Years
📅 Date Calculation Result
Select dates to calculate
December 2024

Why Use Our Date Calculator?

📅 Flexible Calculations

Add or subtract days, weeks, months, and years from any date. Perfect for planning future events or calculating past dates.

⏰ Date Difference

Calculate the exact time between two dates in days, weeks, months, and years. Great for tracking project timelines.

⚡ Instant Results

Get accurate date calculations instantly with our intuitive interface. No waiting, no complex formulas needed.

📋 Event Planning

Essential for planning weddings, birthdays, vacations, and business events. Calculate deadlines and milestones easily.

💼 Project Management

Perfect for project managers to calculate start/end dates, track progress, and set realistic timelines for deliverables.

📱 Mobile Friendly

Calculate dates on any device. Perfect for on-the-go planning and quick date calculations wherever you are.

How to Use the Date Calculator

1
📋 Select Operation

Choose between "Add/Subtract" to modify a date or "Date Difference" to calculate the time between two dates.

2
📝 Enter Dates

Input your starting date (and ending date for difference calculations) using the date picker.

3
🎯 Set Values

For add/subtract, enter the number of days, weeks, months, or years you want to add or subtract.

4
📊 View Results

Click the calculate button to see your results with detailed breakdown and calendar visualization.

Frequently Asked Questions

Our date calculator uses JavaScript's built-in Date object which accounts for leap years, varying month lengths, and daylight saving time where applicable. All calculations are precise and reliable for planning purposes.

The calculator uses your local browser's time zone for all calculations. For date differences and additions/subtractions, the results are based on the same time zone to ensure consistency. For international date planning, we recommend using UTC time.

Currently, our calculator calculates all calendar days including weekends. We're working on adding a business day calculator feature that will exclude weekends and holidays for more precise business planning.

Our calculator automatically accounts for leap years in all calculations. When adding or subtracting years across February 29th, it intelligently adjusts to February 28th or March 1st depending on the target year to maintain accuracy.

Absolutely! All date calculations are performed directly in your browser. No date information is sent to any server or stored anywhere. Once you close the page, all information is gone. This ensures complete privacy and security for your date calculations.