🎉 Holiday Calculator

Calculate dates for official holidays, Easter, Ramadan, and movable feasts

🏠 General
🧮 Calculator
📅 Calendar
🌍 International
⛪ Religious
📖 Guide
🎯 Professional Holiday Calculator

Select Year for Holiday Calculations

🎉 Fixed Holidays
Holidays that occur on the same date every year.
  • New Year's Day - January 1
  • Independence Day (US) - July 4
  • Christmas Day - December 25
  • Valentine's Day - February 14
  • Halloween - October 31
📅 Movable Feasts
Holidays with dates that change based on lunar or other calculations.
  • Easter Sunday (Christian)
  • Ramadan dates (Islamic)
  • Chinese New Year
  • Thanksgiving (US)
  • Passover (Jewish)
🌍 International Holidays
Holidays celebrated worldwide or in specific regions.
  • International Women's Day
  • World Health Day
  • Earth Day
  • World Peace Day
  • Human Rights Day
🧮 Holiday Date Calculators
🐰 Easter Date Calculator
Enter year to calculate Easter
🦃 Thanksgiving Calculator (US & Canada)
Enter year to calculate Thanksgiving
👷 Labor Day Calculator
Enter year to calculate Labor Day
👩‍👧‍👦 Mother's Day Calculator
Enter year to calculate Mother's Day
🎖️ Memorial Day Calculator (US)
Enter year to calculate Memorial Day
📅 Holiday Calendar View
January 2025
🌍 International Holidays by Country
⛪ Religious Holiday Calculator
📿 Islamic Calendar Calculator
✡️ Jewish Calendar Calculator
🏮 Chinese Calendar Calculator
📖 Holiday Calculation Guide
🎯 How Holiday Calculations Work
Holiday calculations use various algorithms depending on the type of holiday and calendar system involved.
  • Fixed holidays use simple date arithmetic
  • Easter uses complex lunar calculations
  • Islamic holidays follow lunar calendar
  • Jewish holidays use lunisolar calendar
🐰 Easter Calculation
Easter is calculated based on the first Sunday after the first full moon on or after the vernal equinox.
  • Western: Uses Gregorian calendar
  • Eastern: May use Julian calendar
  • Complex astronomical calculations
  • Can vary by up to 5 weeks
🌙 Islamic Calendar
Islamic holidays follow the lunar Hijri calendar, which is about 11 days shorter than the solar year.
  • Pure lunar calendar (354 days)
  • Dates shift each year
  • Based on moon sighting
  • Regional variations possible
📅 Calendar Systems
Different cultures use different calendar systems, affecting how holidays are calculated.
  • Gregorian (Solar) - Most common
  • Hijri (Lunar) - Islamic calendar
  • Hebrew (Lunisolar) - Jewish calendar
  • Chinese (Lunisolar) - Traditional Chinese
🌍 Regional Variations
The same holiday may be celebrated on different dates in different countries or regions.
  • Labor Day varies by country
  • Mother's Day has different dates
  • New Year celebrations vary
  • Religious observances may differ
⏰ Accuracy Considerations
Holiday calculations have varying degrees of accuracy depending on the method used.
  • Fixed holidays are always accurate
  • Calculated movable feasts are estimates
  • Religious holidays may need confirmation
  • Astronomical events affect some dates