We use the Gregorian calendar worldwide for civil purposes today. This system, refined in 1582 by Pope Gregory XIII, corrected inaccuracies in the earlier Julian calendar to keep seasons aligned with dates.

Core Features

The Gregorian calendar has 365 days in common years and 366 in leap years (divisible by 4, except century years unless divisible by 400).
It divides time into 12 months with varying lengths: 31, 28/29, 31, 30, and so on.

As of December 31, 2025, we're in year 2025, a common year starting on Wednesday.

Historical Shift

Introduced to fix the Julian calendar's 11-minute annual drift, which had misaligned the equinox by 10 days.
Catholic countries adopted it first; Britain and colonies followed in 1752, skipping 11 days.
Protestant regions and Orthodox churches delayed, creating "Old Style" vs. "New Style" dates until the 20th century.

Global Adoption

Over 95% of nations use it officially, per UN standards, for business, science, and international events.
Exceptions include religious calendars (e.g., Islamic Hijri, Jewish, Chinese lunisolar) for specific observances, but Gregorian dominates secular life.

In 2025 calendars, U.S. federal holidays like Inauguration Day (Jan 20) and Juneteenth (June 19) follow this grid.

Alternatives in Context

  • Julian : Still used by some Orthodox churches; runs 13 days ahead now.
  • Revised Julian : Aligns closer but niche.
  • World Calendar : Proposed reforms for equal quarters exist but never gained traction.

TL;DR : Gregorian calendar is the global standard we use daily—precise, solar-based, and powering 2025's printable layouts with holidays.

Information gathered from public forums or data available on the internet and portrayed here.