Categories

Date Calculator

5 powerful date tools: Date Difference, D-Day, Date Calculator, Lunar/Solar Conversion, and Age Calculator

Comprehensive Date Calculator

A comprehensive date calculator that combines **5 essential date calculation tools** in one interface. Perfect for planning events, calculating ages, working with lunar calendars, and performing date operations.

Key Features

1. Date Difference Calculator

  • Calculate the **exact difference** between two dates
  • Results in days, weeks, months, and years
  • Detailed breakdown (years/months/days) available

2. D-Day Calculator

  • Calculate **countdown** to important dates
  • Shows D-Day format (D-10, D-DAY, D+5)
  • Ideal for event planning and deadlines tracking

3. Date Adder/Subtractor

  • Add or subtract days, weeks, months, or years
  • Calculate future or past dates from any base date
  • Useful for scheduling and deadline calculations

4. Lunar ↔ Solar Conversion

  • Convert between **lunar and solar calendars**
  • Based on **Korean lunar calendar system**; supports leap months
  • Range: 1000 to 2050

5. Man Age (Korean Standard) Calculator

  • Calculate **exact age** from birth date
  • Shows total days/months lived
  • Displays next birthday and days until birthday

Common Use Cases

  • Event Planning: Calculate days until weddings, birthdays, or anniversaries
  • Project Management: Determine project duration and deadlines
  • Cultural Events: Convert between lunar and solar calendars for traditional holidays
  • Legal/Personal: Calculate exact ages and track important dates

Additional Information

Lunar Calendar Information

The lunar calendar is based on the Moon's phases and is still widely used in **East Asian cultures** for traditional holidays. Our converter uses the **Korean lunar calendar system**.

Korean Age (Man Age)

**Man Age** is the age counting system based on the exact years passed since birth. In Korea, this system has been adopted as the **legal standard since 2023**.

🔒 Privacy & Security

**All calculations are performed entirely in your browser using JavaScript.** No dates or personal information are sent to any server. Your privacy is completely protected.