In fact, there are 10 days in the history of the world that were skipped without being experienced. Let’s read how it could be.
Systems used to measure time are based on natural events. Mostly solar and lunar calendars are used. The transition to the solar calendar we use today was made during the time of Pope Gregory XIII.
Before this transition, a solar year was taken as 365 days, and leap years were tried to be collected by counting 25 February as two days every 4 years. However, a solar year is 365 days, 5 hours, 48 minutes, 46 seconds. That makes one day’s play per century. When Pope Gregory XIII came, in order to correct the days passed in 1582, the date of the next day was accepted as October 15, 1582, with the order given on October 4, 1582. It is interesting, is not it?
There were two reasons to establish the Gregorian calendar. First, the Julian calendar assumed incorrectly that the average solar year is exactly 365.25 days long, an overestimate of a little under one day per century, and thus has a leap year every four years without exception. The Gregorian reform shortened the average (calendar) year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes. Second, in the years since the First Council of Nicaea in AD 325,[b] the excess leap days introduced by the Julian algorithm had caused the calendar to drift such that the (Northern) spring equinox was occurring well before its nominal 21 March date. This date was important to the Christian churches because it is fundamental to the calculation of the date of Easter. To reinstate the association, the reform advanced the date by 10 days: Thursday 4 October 1582 was followed by Friday 15 October 1582. In addition, the reform also altered the lunar cycle used by the Church to calculate the date for Easter, because astronomical new moons were occurring four days before the calculated dates. It is notable that whilst the reform introduced minor changes, the calendar continued to be fundamentally based on the same geocentric theory as its predecessor.
The Gregorian Calendar was not accepted in eastern Christendom for several hundred years, and then only as the civil calendar. The Gregorian Calendar was instituted in Russia by the communists in 1917, and the last Eastern Orthodox country to accept the calendar was Greece in 1923.
While some Eastern Orthodox national churches have accepted the Gregorian Calendar dates for “fixed” feasts (feasts that occur on the same date every year), the dates of all movable feasts (such as Easter) are still calculated in the Eastern Orthodox Churches by reference to the Julian Calendar.
Ten days were erased from history in 1582