October 2019 — Gregorian Calendar
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The Perpetual Calendar will create a calendar for any month in any year from 1 AD. The switch between Julian and Gregorian dates may be selected to occur in 1582, when the Gregorian Calendar was first used, in 1701, when Protestant Switzerland changed, or in 1752, when the English Government made the switch. In the latter case, for the months of January, February, and March, the calendar will display a dual year for the years between 1155 and 1752. During these years, the English government officially began the New Year on March 25.
5 Mar 2019