Dates near leap days that are observed in the Julian calendar but not in the Gregorian are listed in the table. Dates near the adoption date in some countries are also listed. For dates not listed, see below.

Currently, the Julian calendar is 13 days behind the Gregorian calendar. So, to convert from the Julian calendar to the Gregorian calendar, add 13 days; to convert in the opposite direction, subtract 13 …

Apr 4, 2024 · Explore the major differences between the Julian Calendar and the Gregorian Calendar, including the exact reasons that necessitated the change to Gregorian Calendar.

Dec 16, 2025 · Although the Julian calendar was the dominant European dating system for more than 1,600 years, its solar year measurements (365.25 days versus the more precise 365.2422 days) …

Sep 22, 2023 · The Julian calendar adds a leap day every four years without exception, while the Gregorian calendar employs a more sophisticated formula that skips certain century years to …

Jan 28, 2025 · Discover differences between the Julian and Gregorian calendars, their histories, and how the Gregorian calendar became the most widely used.

Apr 8, 2025 · Over a millennium later, this Nicene unity in the celebration of Christ’s resurrection was revisited by the introduction of the Gregorian calendar in 1582. Since then, the bases upon which the …