At the Parliament begun and holden at Westminster, the tenth day of November, anno Dom. 1747, in the twenty first year of the reign of our Sovereign Lord George the Second, by the grace of God, of Great Britain, France and Ireland, King, Defender of the Faith, &c. And from thence continued by several prorogations to the seventeenth day of January, 1750 [1751, new style], being the fourth session of this present Parliament : An act for regulating the commencement of the year; and for correcting the calender [as printed] now in use.