Date Calculator
A comprehensive suite of date and time calculation tools, including time difference, working days, date addition and subtraction, and more.
Overview
Time Difference Calculator
Business Days Calculator
Date Addition and Subtraction Calculator
Date Addition and Subtraction Calculator
Adds or subtracts a specified time interval from a given date.
Date Addition and Subtraction
Shanghai (UTC+8)
Shanghai (UTC+8)
Calculation History
No history records available
Core Features
Multi-Unit Precise Calculation
Supports independent or combined calculations in six time units: years, months, days, hours, minutes, and seconds, with second-level accuracy
Intelligent Time Handling
Automatically manages complex time logic such as month-end overflow, leap year February 29, and daylight saving time transitions to ensure calculation accuracy
Global Timezone Support
Supports over 200 global timezones, with independent settings for base and result timezones, automatically handling timezone conversions and offsets
Smart History Recording
Automatically saves each calculation result, supports history management and one-click reapplication to improve work efficiency
Application Scenarios
Contract Duration Management
Accurately calculate contract expiry dates, renewal times, and service periods, supporting international contracts across different timezones
Project Timeline Planning
Set project milestones, calculate delivery dates, and schedule work progress, supporting complex project time management
Financial Date Calculations
Calculate loan maturity dates, installment payment times, interest settlement dates, and billing cycle management for financial purposes
Personal Time Management
Calculate countdowns to birthdays, reminders for anniversaries, holiday planning, and important event scheduling for personal affairs
Usage Guide
1.Select a reference date and time (accurate to seconds)
2.Set the reference timezone (auto-detect current timezone)
3.Choose calculation type: add or subtract time
4.Input the amount of time to calculate (years, months, days, hours, minutes, seconds)
5.Select the result display timezone (can differ from the reference timezone)
6.The system automatically performs real-time calculation and displays the result
Frequently Asked Questions
Q: How to use the date addition and subtraction calculator?
A: Select a reference date and time along with the timezone, set the units and values to add or subtract, choose the result timezone, and the system will automatically perform real-time calculation. Supports multiple units simultaneously, such as adding 2 years, 3 months, and 5 days at once.
Q: How is month-end date intelligently handled?
A: The system intelligently manages month-end overflow, for example, adding 1 month to January 31 results in February 28 (common year) or February 29 (leap year), ensuring the validity and reasonableness of the result date.
Q: How are leap years and special dates handled?
A: Automatically detects leap years and correctly processes special dates such as February 29. Considers leap year rules during date calculations to avoid invalid dates and ensure accurate results.
Q: How to use the timezone feature?
A: Supports over 200 global timezones, with independent settings for base and result timezones. Automatically handles daylight saving time transitions, displaying timezone codes, abbreviations, and UTC offsets, suitable for international applications.
Related Tools
In addition to the date addition and subtraction calculator, we also offer specialized tools such as the time difference calculator and workday calculator, forming a comprehensive suite of time calculation tools to meet your various date and time calculation needs.