Gregorian Calendar
January → December
The Gregorian calendar is the most widely used civil calendar in the world. Introduced by Pope Gregory XIII in 1582 and adopted globally, it is a solar calendar with 12 months totalling 365 days (366 in leap years). India officially adopted the Gregorian calendar for civil purposes in 1752. Explore each month's key dates, global holidays, Indian festivals, and their connections to traditional calendars.
All 12 Months
January
Jan 1–31
- New Year's Day
- Makar Sankranti / Pongal
February
Feb 1–28/29
- Valentine's Day
- Vasant Panchami
March
Mar 1–31
- Holi
- Ugadi / Gudi Padwa / Tamil New Year
April
Apr 1–30
- Tamil New Year (Chithirai 1)
- Baisakhi / Vaisakhi
May
May 1–31
- Labour Day / May Day
- Buddha Purnima (Vesak)
June
Jun 1–30
- Rath Yatra
- Summer Solstice
July
Jul 1–31
- Guru Purnima
- Ashadha / Karka Sankranti
August
Aug 1–31
- Independence Day India
- Raksha Bandhan
September
Sep 1–30
- Ganesh Chaturthi
- Autumn Equinox
October
Oct 1–31
- Navaratri / Dussehra
- Gandhi Jayanti
November
Nov 1–30
- Diwali (sometimes)
- Chhath Puja
December
Dec 1–31
- Christmas
- Winter Solstice
About the Gregorian Calendar
🌍 Global Standard
The Gregorian calendar is the international standard for civil, commercial, and scientific use. All 195 UN member states use it as their primary or secondary calendar. International business, travel, and legal documents use Gregorian dates universally.
🇮🇳 India & Gregorian
India uses the Gregorian calendar for all government, legal, and commercial purposes (adopted 1752). However, traditional Indian festivals continue to follow regional lunar and solar calendars — which is why Diwali, Holi, and Eid fall on different Gregorian dates each year.
☀️ Solar Accuracy
The Gregorian calendar corrects the Julian calendar's drift by skipping leap years in century years (1700, 1800, 1900) except those divisible by 400 (1600, 2000). This gives an average year length of 365.2425 days — accurate to within 1 day in ~3,030 years.
🕐 IST Connection
Indian Standard Time (IST, UTC +5:30) is calculated from Gregorian noon. All Indian public holidays are officially declared using Gregorian dates. Many Indian festivals that follow lunar calendars are announced in advance using their Gregorian date equivalents.
Compare with Indian Calendars
Indian traditional calendars use lunar or sidereal solar systems that shift relative to the Gregorian calendar each year. Here's a quick comparison: