The Cyprian Calendar is a reconstruction of the Roman lunisolar calendar which preceded the Julian Calendar. It consists of thirteen months:

Month Days
Primilis 30
Sectilis 29
Tertilis 30
Quartilis 29
Quintilis 30
Sextilis 29
September 30
October 29
November 30
December 29
Unodecember 30
Duodecember 29
Intercalaris Adjusted

The first day of each year, 01 Pri, i.e. the first day of Primilis, is defined as beginning at sunset preceding the night of the new moon following the spring equinox. Each subsequent day begins at the following sunset. The length of Intercalaris is adjusted each year to ensure that the next 01 Pri falls on the correct day.

His Majesty's Government determines when 01 Pri ought to fall. Years are lettered according to the reign of the current King of Cyprus. Thus the first year of Thomas T1, the second of the same, T2, etc. If there was a King of Cyprus called John, the first year of his reign would be lettered J1; if Timothy, then Ti1. If there was a second King of Cyprus called Thomas, he would be known as Thomas II, and the first year of his reign would be lettered TII/1.

Now in the two thousand and fourteenth year of the New Style, the  vernal equinox occurred at three minutes to five in the afternoon of the twentieth day of March, i.e. 20 Mar 2014 (NS), and the subsequent new moon and sunset occurred at 1948 30 Mar and 1932 31 Mar respectively. Thus Year T1 of the Cyprian Calendar began at sunset on that day. Thus it can calculated that the Cyprian Calendar will follow the Hebrew Calendar until at least 2114 (NS).

The Cyprian date of any given day can be calculated using the number of the Hebrew date of that day, and using the following table to convert the month:

Cyprian Hebrew
Primilis Nisan
Sectilis Iyar
Tertilis Sivan
Quartilis Tammuz
Quintilis Av
Sextilis Elul
September Tishrei
October Cheshvan
November Kislev
December Tevet
Unodecember Shevat
Duodecember Adar or Adar I
Intercalaris Adar II