ˈɪɾəli wʌz wˈʌn ʌvðə fjˈuː ɹˈiːdʒənz tʊ ɪmˈiːdɪətli kənvˈɜːt fɹʌmðə dʒˈuːliən kˈæləndɚ tə ðə ɡɹɛɡˈoːɹiən: fˈoːɹ ɑːktˈoʊbɚ wˈʌn θˈaʊzənd fˈaɪvhˈʌndɹɪd ˈeɪɾi tˈuː wʌz fˈɑːloʊd baɪ fˈɪftiːn ɑːktˈoʊbɚ wˈʌn θˈaʊzənd fˈaɪvhˈʌndɹɪd ˈeɪɾi tˈuː, ðə lˈæɾɚ bˌiːɪŋ ðə fˈɜːst dˈeɪ ʌvðə nˈuː ɡɹɛɡˈoːɹiən kˈæləndɚ.
Italy was one of the few regions to immediately convert from the Julian calendar to the Gregorian: 4 October 1582 was followed by 15 October 1582, the latter being the first day of the new Gregorian calendar.