World Calendar Converter
Pick any date and see it across 10+ calendar systems. Includes moon phases, eclipses, solstices, and equinoxes for the year.
Day of Week
Thursday
Day of Year
141 / 365
ISO Week
W21
Leap Year
No
🌒
Moon Phase
Waxing Crescent
29% illuminated
Date in Different Calendars
Gregorian
Thursday, May 21, 2026
21 May 2026 (Anno Domini)
Islamic (Umm al-Qura)
Thursday, Dhuʻl-Hijjah 4, 1447 AH
4 Dhuʻl-Hijjah 1447 (Anno Hegirae)
Islamic (Civil/Tabular)
Thursday, Dhuʻl-Hijjah 4, 1447 AH
4 Dhuʻl-Hijjah 1447 (Anno Hegirae)
Hebrew
Thursday, 5 Sivan 5786
5 Sivan 5786 (AM)
Chinese
Thursday, Fourth Month 5, 2026(bing-wu)
5 Fourth Month
Persian (Solar Hijri)
Thursday, Ordibehesht 31, 1405 AP
31 Ordibehesht 1405 (AP)
Indian (Saka)
Thursday, Vaisakha 31, 1948 Śaka
31 Vaisakha 1948 (Śaka)
Buddhist
Thursday, May 21, 2569 BE
21 May 2569 (BE)
Japanese
Thursday, May 21, 8 Reiwa
21 May 8 (Reiwa)
Coptic
Thursday, Bashans 13, 1742 AM
13 Bashans 1742 (Anno Martyrum)
Ethiopian
Thursday, Genbot 13, 2018 AM
13 Genbot 2018 (AM)
Solstices & Equinoxes in 2026
🌱
March Equinox (Spring)
March 20, 2026
☀️
June Solstice (Summer)
June 21, 2026
🍂
September Equinox (Autumn)
September 23, 2026
❄️
December Solstice (Winter)
December 21, 2026
Eclipses in 2026
☀️
Penumbral Partial Solar Eclipse
Feb 17, 2026
🌙
Penumbral Lunar Eclipse
Aug 28, 2026
About this tool
Different cultures and religions track time using their own calendar systems. This tool converts any Gregorian date into 10+ calendar systems using your browser's built-in internationalization APIs. It also calculates moon phases, solar and lunar eclipses, and solstice/equinox dates dynamically using astronomical algorithms. All the math runs right in your browser, no external APIs needed.
Converts dates across 11 calendar systems instantly
Dynamic moon phase calculation with illumination percentage
Solar and lunar eclipse detection for any year
Solstice and equinox dates calculated astronomically
Quick day-of-year, ISO week, and leap year info
Runs entirely in your browser, nothing leaves your device