Add/Subtract Date

Add or subtract years, months, days, hours, minutes, or seconds to a date and time, with optional timezone support.

Enter Date, Timezone & Amount

Start Date & Time

Timezone

Years

Months

Days

Hours

Minutes

Seconds

Add Subtract

Result

Enter a start date, amount, and operation to calculate the new date

Embed This Tool on Your Website

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<iframe src="https://nextools.org/widgets/date-tools/add-subtract-date.php" width="100%" height="450" style="border:none; border-radius:12px; box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);" title="Nextools Add Subtract Date"></iframe>

What is the Add/Subtract Date Calculator?

The Add/Subtract Date Calculator is a precise time-management tool that allows you to calculate future or past dates by adding or subtracting specific time intervals from a starting date.

Whether you need to know what the date will be 90 days from today, or what the exact date and time was 5 years, 3 months, and 12 hours ago, this tool handles the complex leap-year and calendar math for you instantly.

Common Use Cases

Business & Finance: Calculate invoice due dates (e.g., Net 30, Net 60) or contract expiration dates.
Medical & Pregnancy: Doctors and expecting parents use it to calculate trimesters or due dates based on specific starting points.
Legal & Compliance: Determine statute of limitations or exact filing deadlines based on court orders.

How to Use This Tool

Select your Start Date & Time using the calendar picker.
Ensure the correct Timezone is selected (default is UTC).
Input the number of Years, Months, Days, etc., you wish to calculate.
Choose either the Add or Subtract radio button.
Click Calculate to instantly see the resulting date and time.

Frequently Asked Questions (FAQ)

Does this tool account for Leap Years?

Yes, our date calculator uses built-in, highly accurate calendar algorithms that automatically account for leap years (the extra day in February every 4 years).

Does it adjust for Daylight Saving Time (DST)?

Yes, because the tool asks for your specific Timezone, it automatically accounts for Daylight Saving Time shifts if your addition/subtraction crosses a DST boundary.

Can I add months and subtract days at the same time?

Currently, the tool performs a single operation (either Add or Subtract) on the total sum of the time intervals you input. To do complex multi-directional math, we recommend calculating the months first, then using that result as the start date to subtract the days.